diff --git a/app/assets/javascripts/browse.js b/app/assets/javascripts/browse.js
index d67f04477..b7e9c01d5 100644
--- a/app/assets/javascripts/browse.js
+++ b/app/assets/javascripts/browse.js
@@ -1,17 +1,17 @@
-var browseBoxControl;
-var browseMode = "auto";
-var browseBounds;
-var browseFeatureList;
-var browseActiveFeature;
-var browseDataLayer;
-var browseSelectControl;
-var browseObjectList;
-var areasHidden = false;
-
-OpenLayers.Feature.Vector.style['default'].strokeWidth = 3;
-OpenLayers.Feature.Vector.style['default'].cursor = "pointer";
-    
 function startBrowse(sidebarHtml) {
+  var browseBoxControl;
+  var browseMode = "auto";
+  var browseBounds;
+  var browseFeatureList;
+  var browseActiveFeature;
+  var browseDataLayer;
+  var browseSelectControl;
+  var browseObjectList;
+  var areasHidden = false;
+
+  OpenLayers.Feature.Vector.style['default'].strokeWidth = 3;
+  OpenLayers.Feature.Vector.style['default'].cursor = "pointer";
+
   map.dataLayer.active = true;
 
   $("#sidebar_title").html(I18n.t('browse.start_rjs.data_frame_title'));
@@ -42,508 +42,508 @@ function startBrowse(sidebarHtml) {
   $("#browse_hide_areas_box").html(I18n.t('browse.start_rjs.hide_areas'));
   $("#browse_hide_areas_box").show();
   $("#browse_hide_areas_box").click(hideAreas);
-}
 
-function updateData() {
-  if (browseMode == "auto") {
-    if (map.getZoom() >= 15) {
-        useMap(false);
-    } else {
-        setStatus(I18n.t('browse.start_rjs.zoom_or_select'));
-    }    
-  }
-}
-
-function stopBrowse() {
-  if (map.dataLayer.active) {
-    map.dataLayer.active = false;
-
-    if (browseSelectControl) {   
-      browseSelectControl.destroy();  
-      browseSelectControl = null;
-    } 
-
-    if (browseBoxControl) {
-      browseBoxControl.destroy();
-      browseBoxControl = null;
-    }		
-
-    if (browseActiveFeature) {
-      browseActiveFeature.destroy(); 
-      browseActiveFeature = null; 
-    }
-
-    if (browseDataLayer) {
-      browseDataLayer.destroy();
-      browseDataLayer = null; 
-    } 
-
-    map.dataLayer.setVisibility(false);
-    map.events.unregister("moveend", map, updateData);
-  }    
-}
-
-function startDrag() {
-  $("#browse_select_box").html(I18n.t('browse.start_rjs.drag_a_box'));
-
-  browseBoxControl.activate();
-
-  return false;
-}
-
-function useMap(reload) {
-  var bounds = map.getExtent();
-  var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
-
-  if (!browseBounds || !browseBounds.containsBounds(projected)) {
-    var center = bounds.getCenterLonLat();
-    var tileWidth = bounds.getWidth() * 1.2;
-    var tileHeight = bounds.getHeight() * 1.2;
-    var tileBounds = new OpenLayers.Bounds(center.lon - (tileWidth / 2),
-                                           center.lat - (tileHeight / 2),
-                                           center.lon + (tileWidth / 2),
-                                           center.lat + (tileHeight / 2));
-
-    browseBounds = tileBounds;
-    getData(tileBounds, reload);
-
-    browseMode = "auto";
-
-    $("#browse_select_view").hide();
-  }
-
-  return false;
-}
-
-function hideAreas() {
-  $("#browse_hide_areas_box").html(I18n.t('browse.start_rjs.show_areas'));
-  $("#browse_hide_areas_box").show();
-  $("#browse_hide_areas_box").click(showAreas);
-
-  areasHidden = true;
-
-  useMap(true);
-}
-
-function showAreas() {
-  $("#browse_hide_areas_box").html(I18n.t('browse.start_rjs.hide_areas'));
-  $("#browse_hide_areas_box").show();
-  $("#browse_hide_areas_box").click(hideAreas);
-
-  areasHidden = false;
-
-  useMap(true);
-}
-
-function endDrag(bbox) {
-  var bounds = bbox.getBounds();
-  var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
-
-  browseBoxControl.deactivate();
-  browseBounds = projected;
-  getData(bounds);
-
-  browseMode = "manual";  
-
-  $("#browse_select_box").html(I18n.t('browse.start_rjs.manually_select'));
-  $("#browse_select_view").show();
-}
-
-function displayFeatureWarning(count, limit, callback) {
-  clearStatus();
-
-  var div = document.createElement("div");
-
-  var p = document.createElement("p");
-  p.appendChild(document.createTextNode(I18n.t("browse.start_rjs.loaded_an_area_with_num_features", { num_features: count, max_features: limit })));
-  div.appendChild(p);
-
-  var input = document.createElement("input");
-  input.type = "submit";
-  input.value = I18n.t('browse.start_rjs.load_data');
-  input.onclick = callback;
-  div.appendChild(input); 
-
-  $("#browse_content").html("");
-  $("#browse_content").append(div);
-}
-
-function customDataLoader(resp, options) {
-  if (map.dataLayer.active) {
-    var request = resp.priv;
-    var doc = request.responseXML;
-
-    if (!doc || !doc.documentElement) {
-      doc = request.responseText;
-    }
-
-    resp.features = this.format.read(doc);
-
-    if (!this.maxFeatures || resp.features.length <= this.maxFeatures) {
-      options.callback.call(options.scope, resp);
-    } else {
-      displayFeatureWarning(resp.features.length, this.maxFeatures, function () {
-        options.callback.call(options.scope, resp);
-      });
-    }
-  }
-}
-
-function getData(bounds, reload) {
-  var projected = bounds.clone().transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
-  var size = projected.getWidth() * projected.getHeight();
-
-  if (size > OSM.MAX_REQUEST_AREA) {
-    setStatus(I18n.t("browse.start_rjs.unable_to_load_size", { max_bbox_size: OSM.MAX_REQUEST_AREA, bbox_size: size }));
-  } else {
-    loadData("/api/" + OSM.API_VERSION + "/map?bbox=" + projected.toBBOX(), reload);
-  }
-}
-
-function loadData(url, reload) {
-  setStatus(I18n.t('browse.start_rjs.loading'));
-
-  $("#browse_content").empty();
-
-  var formatOptions = {
-    checkTags: true,
-    interestingTagsExclude: ['source','source_ref','source:ref','history','attribution','created_by','tiger:county','tiger:tlid','tiger:upload_uuid']
-  };
-
-  if (areasHidden) formatOptions.areaTags = [];
-
-  if (!browseDataLayer || reload) {
-    var style = new OpenLayers.Style();
-
-    style.addRules([new OpenLayers.Rule({
-      symbolizer: {
-        Polygon: { fillColor: '#ff0000', strokeColor: '#ff0000' },
-        Line: { fillColor: '#ffff00', strokeColor: '#000000', strokeOpacity: '0.4' },
-        Point: { fillColor: '#00ff00', strokeColor: '#00ff00' }
+  function updateData() {
+    if (browseMode == "auto") {
+      if (map.getZoom() >= 15) {
+          useMap(false);
+      } else {
+          setStatus(I18n.t('browse.start_rjs.zoom_or_select'));
       }
-    })]);
-
-    if (browseDataLayer) browseDataLayer.destroyFeatures();
-
-    /*
-     * Modern browsers are quite happy showing far more than 100 features in
-     * the data browser, so increase the limit to 2000 by default, but keep
-     * it restricted to 500 for IE8 and 100 for older IEs.
-     */
-    var maxFeatures = 2000;
-
-    /*@cc_on
-      if (navigator.appVersion < 8) {
-        maxFeatures = 100;
-      } else if (navigator.appVersion < 9) {
-        maxFeatures = 500;
-      }
-    @*/
-
-    browseDataLayer = new OpenLayers.Layer.Vector("Data", {
-      strategies: [ 
-        new OpenLayers.Strategy.Fixed()
-      ],
-      protocol: new OpenLayers.Protocol.HTTP({
-        url: url,
-        format: new OpenLayers.Format.OSM(formatOptions),
-        maxFeatures: maxFeatures,
-        handleRead: customDataLoader
-      }),
-      projection: new OpenLayers.Projection("EPSG:4326"),
-      displayInLayerSwitcher: false,
-      styleMap: new OpenLayers.StyleMap({
-        'default': style,
-        'select': { strokeColor: '#0000ff', strokeWidth: 8 }
-      })
-    });
-    browseDataLayer.events.register("loadend", browseDataLayer, dataLoaded );
-    map.addLayer(browseDataLayer);
-            
-    browseSelectControl = new OpenLayers.Control.SelectFeature(browseDataLayer, { onSelect: onFeatureSelect });
-    browseSelectControl.handlers.feature.stopDown = false;
-    browseSelectControl.handlers.feature.stopUp = false;
-    map.addControl(browseSelectControl);
-    browseSelectControl.activate();
-  } else {
-    browseDataLayer.destroyFeatures();
-    browseDataLayer.refresh({ url: url });
+    }
   }
 
-  browseActiveFeature = null;
-}
+  function stopBrowse() {
+    if (map.dataLayer.active) {
+      map.dataLayer.active = false;
 
-function dataLoaded() {
-  if (this.map.dataLayer.active) {
+      if (browseSelectControl) {
+        browseSelectControl.destroy();
+        browseSelectControl = null;
+      }
+
+      if (browseBoxControl) {
+        browseBoxControl.destroy();
+        browseBoxControl = null;
+      }
+
+      if (browseActiveFeature) {
+        browseActiveFeature.destroy();
+        browseActiveFeature = null;
+      }
+
+      if (browseDataLayer) {
+        browseDataLayer.destroy();
+        browseDataLayer = null;
+      }
+
+      map.dataLayer.setVisibility(false);
+      map.events.unregister("moveend", map, updateData);
+    }
+  }
+
+  function startDrag() {
+    $("#browse_select_box").html(I18n.t('browse.start_rjs.drag_a_box'));
+
+    browseBoxControl.activate();
+
+    return false;
+  }
+
+  function useMap(reload) {
+    var bounds = map.getExtent();
+    var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+
+    if (!browseBounds || !browseBounds.containsBounds(projected)) {
+      var center = bounds.getCenterLonLat();
+      var tileWidth = bounds.getWidth() * 1.2;
+      var tileHeight = bounds.getHeight() * 1.2;
+      var tileBounds = new OpenLayers.Bounds(center.lon - (tileWidth / 2),
+                                             center.lat - (tileHeight / 2),
+                                             center.lon + (tileWidth / 2),
+                                             center.lat + (tileHeight / 2));
+
+      browseBounds = tileBounds;
+      getData(tileBounds, reload);
+
+      browseMode = "auto";
+
+      $("#browse_select_view").hide();
+    }
+
+    return false;
+  }
+
+  function hideAreas() {
+    $("#browse_hide_areas_box").html(I18n.t('browse.start_rjs.show_areas'));
+    $("#browse_hide_areas_box").show();
+    $("#browse_hide_areas_box").click(showAreas);
+
+    areasHidden = true;
+
+    useMap(true);
+  }
+
+  function showAreas() {
+    $("#browse_hide_areas_box").html(I18n.t('browse.start_rjs.hide_areas'));
+    $("#browse_hide_areas_box").show();
+    $("#browse_hide_areas_box").click(hideAreas);
+
+    areasHidden = false;
+
+    useMap(true);
+  }
+
+  function endDrag(bbox) {
+    var bounds = bbox.getBounds();
+    var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+
+    browseBoxControl.deactivate();
+    browseBounds = projected;
+    getData(bounds);
+
+    browseMode = "manual";
+
+    $("#browse_select_box").html(I18n.t('browse.start_rjs.manually_select'));
+    $("#browse_select_view").show();
+  }
+
+  function displayFeatureWarning(count, limit, callback) {
     clearStatus();
 
-    browseObjectList = document.createElement("div");
+    var div = document.createElement("div");
 
-    var heading = document.createElement("p");
-    heading.className = "browse_heading";
-    heading.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.heading')));
-    browseObjectList.appendChild(heading);
+    var p = document.createElement("p");
+    p.appendChild(document.createTextNode(I18n.t("browse.start_rjs.loaded_an_area_with_num_features", { num_features: count, max_features: limit })));
+    div.appendChild(p);
 
-    var list = document.createElement("ul");
+    var input = document.createElement("input");
+    input.type = "submit";
+    input.value = I18n.t('browse.start_rjs.load_data');
+    input.onclick = callback;
+    div.appendChild(input);
 
-    for (var i = 0; i < this.features.length; i++) {
-      var feature = this.features[i]; 
-            
-      // Type, for linking
-      var type = featureType(feature);
-      var typeName = featureTypeName(feature);
-      var li = document.createElement("li");
-      li.appendChild(document.createTextNode(typeName + " "));
-            
-      // Link, for viewing in the tab
-      var link = document.createElement("a");
-      link.href =  "/browse/" + type + "/" + feature.osm_id; 
-      var name = featureName(feature);
-      link.appendChild(document.createTextNode(name));
-      link.feature = feature;
-      link.onclick = OpenLayers.Function.bind(viewFeatureLink, link);   
-      li.appendChild(link);
+    $("#browse_content").html("");
+    $("#browse_content").append(div);
+  }
 
-      list.appendChild(li);
+  function customDataLoader(resp, options) {
+    if (map.dataLayer.active) {
+      var request = resp.priv;
+      var doc = request.responseXML;
+
+      if (!doc || !doc.documentElement) {
+        doc = request.responseText;
+      }
+
+      resp.features = this.format.read(doc);
+
+      if (!this.maxFeatures || resp.features.length <= this.maxFeatures) {
+        options.callback.call(options.scope, resp);
+      } else {
+        displayFeatureWarning(resp.features.length, this.maxFeatures, function () {
+          options.callback.call(options.scope, resp);
+        });
+      }
+    }
+  }
+
+  function getData(bounds, reload) {
+    var projected = bounds.clone().transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
+    var size = projected.getWidth() * projected.getHeight();
+
+    if (size > OSM.MAX_REQUEST_AREA) {
+      setStatus(I18n.t("browse.start_rjs.unable_to_load_size", { max_bbox_size: OSM.MAX_REQUEST_AREA, bbox_size: size }));
+    } else {
+      loadData("/api/" + OSM.API_VERSION + "/map?bbox=" + projected.toBBOX(), reload);
+    }
+  }
+
+  function loadData(url, reload) {
+    setStatus(I18n.t('browse.start_rjs.loading'));
+
+    $("#browse_content").empty();
+
+    var formatOptions = {
+      checkTags: true,
+      interestingTagsExclude: ['source','source_ref','source:ref','history','attribution','created_by','tiger:county','tiger:tlid','tiger:upload_uuid']
+    };
+
+    if (areasHidden) formatOptions.areaTags = [];
+
+    if (!browseDataLayer || reload) {
+      var style = new OpenLayers.Style();
+
+      style.addRules([new OpenLayers.Rule({
+        symbolizer: {
+          Polygon: { fillColor: '#ff0000', strokeColor: '#ff0000' },
+          Line: { fillColor: '#ffff00', strokeColor: '#000000', strokeOpacity: '0.4' },
+          Point: { fillColor: '#00ff00', strokeColor: '#00ff00' }
+        }
+      })]);
+
+      if (browseDataLayer) browseDataLayer.destroyFeatures();
+
+      /*
+       * Modern browsers are quite happy showing far more than 100 features in
+       * the data browser, so increase the limit to 2000 by default, but keep
+       * it restricted to 500 for IE8 and 100 for older IEs.
+       */
+      var maxFeatures = 2000;
+
+      /*@cc_on
+        if (navigator.appVersion < 8) {
+          maxFeatures = 100;
+        } else if (navigator.appVersion < 9) {
+          maxFeatures = 500;
+        }
+      @*/
+
+      browseDataLayer = new OpenLayers.Layer.Vector("Data", {
+        strategies: [
+          new OpenLayers.Strategy.Fixed()
+        ],
+        protocol: new OpenLayers.Protocol.HTTP({
+          url: url,
+          format: new OpenLayers.Format.OSM(formatOptions),
+          maxFeatures: maxFeatures,
+          handleRead: customDataLoader
+        }),
+        projection: new OpenLayers.Projection("EPSG:4326"),
+        displayInLayerSwitcher: false,
+        styleMap: new OpenLayers.StyleMap({
+          'default': style,
+          'select': { strokeColor: '#0000ff', strokeWidth: 8 }
+        })
+      });
+      browseDataLayer.events.register("loadend", browseDataLayer, dataLoaded );
+      map.addLayer(browseDataLayer);
+
+      browseSelectControl = new OpenLayers.Control.SelectFeature(browseDataLayer, { onSelect: onFeatureSelect });
+      browseSelectControl.handlers.feature.stopDown = false;
+      browseSelectControl.handlers.feature.stopUp = false;
+      map.addControl(browseSelectControl);
+      browseSelectControl.activate();
+    } else {
+      browseDataLayer.destroyFeatures();
+      browseDataLayer.refresh({ url: url });
     }
 
-    browseObjectList.appendChild(list);
+    browseActiveFeature = null;
+  }
+
+  function dataLoaded() {
+    if (this.map.dataLayer.active) {
+      clearStatus();
+
+      browseObjectList = document.createElement("div");
+
+      var heading = document.createElement("p");
+      heading.className = "browse_heading";
+      heading.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.heading')));
+      browseObjectList.appendChild(heading);
+
+      var list = document.createElement("ul");
+
+      for (var i = 0; i < this.features.length; i++) {
+        var feature = this.features[i];
+
+        // Type, for linking
+        var type = featureType(feature);
+        var typeName = featureTypeName(feature);
+        var li = document.createElement("li");
+        li.appendChild(document.createTextNode(typeName + " "));
+
+        // Link, for viewing in the tab
+        var link = document.createElement("a");
+        link.href =  "/browse/" + type + "/" + feature.osm_id;
+        var name = featureName(feature);
+        link.appendChild(document.createTextNode(name));
+        link.feature = feature;
+        link.onclick = OpenLayers.Function.bind(viewFeatureLink, link);
+        li.appendChild(link);
+
+        list.appendChild(li);
+      }
+
+      browseObjectList.appendChild(list);
+
+      var link = document.createElement("a");
+      link.href = this.protocol.url;
+      link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.api')));
+      browseObjectList.appendChild(link);
+
+      $("#browse_content").html(browseObjectList);
+    }
+  }
+
+  function viewFeatureLink() {
+    var layer = this.feature.layer;
+
+    for (var i = 0; i < layer.selectedFeatures.length; i++) {
+      var f = layer.selectedFeatures[i];
+      layer.drawFeature(f, layer.styleMap.createSymbolizer(f, "default"));
+    }
+
+    onFeatureSelect(this.feature);
+
+    if (browseMode != "auto") {
+      map.setCenter(this.feature.geometry.getBounds().getCenterLonLat());
+    }
+
+    return false;
+  }
+
+  function loadObjectList() {
+    $("#browse_content").empty();
+    $("#browse_content").append(browseObjectList);
+
+    return false;
+  }
+
+  function onFeatureSelect(feature) {
+    // Unselect previously selected feature
+    if (browseActiveFeature) {
+      browseActiveFeature.layer.drawFeature(
+        browseActiveFeature,
+        browseActiveFeature.layer.styleMap.createSymbolizer(browseActiveFeature, "default")
+      );
+    }
+
+    // Redraw in selected style
+    feature.layer.drawFeature(
+      feature, feature.layer.styleMap.createSymbolizer(feature, "select")
+    );
+
+    // If the current object is the list, don't innerHTML="", since that could clear it.
+    if ($("#browse_content").firstChild == browseObjectList) {
+      $("#browse_content").removeChild(browseObjectList);
+    } else {
+      $("#browse_content").empty();
+    }
+
+    // Create a link back to the object list
+    var div = document.createElement("div");
+    div.style.textAlign = "center";
+    div.style.marginBottom = "20px";
+    $("#browse_content").append(div);
+    var link = document.createElement("a");
+    link.href = "#";
+    link.onclick = loadObjectList;
+    link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.back')));
+    div.appendChild(link);
+
+    var table = document.createElement("table");
+    table.width = "100%";
+    table.className = "browse_heading";
+    $("#browse_content").append(table);
+
+    var tr = document.createElement("tr");
+    table.appendChild(tr);
+
+    var heading = document.createElement("td");
+    heading.appendChild(document.createTextNode(featureNameSelect(feature)));
+    tr.appendChild(heading);
+
+    var td = document.createElement("td");
+    td.align = "right";
+    tr.appendChild(td);
+
+    var type = featureType(feature);
+    var link = document.createElement("a");
+    link.href = "/browse/" + type + "/" + feature.osm_id;
+    link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.details')));
+    td.appendChild(link);
+
+    var div = document.createElement("div");
+    div.className = "browse_details";
+
+    $("#browse_content").append(div);
+
+    // Now the list of attributes
+    var ul = document.createElement("ul");
+    for (var key in feature.attributes) {
+      var li = document.createElement("li");
+      var b = document.createElement("b");
+      b.appendChild(document.createTextNode(key));
+      li.appendChild(b);
+      li.appendChild(document.createTextNode(": " + feature.attributes[key]));
+      ul.appendChild(li);
+    }
+
+    div.appendChild(ul);
 
     var link = document.createElement("a");
-    link.href = this.protocol.url;
-    link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.api')));
-    browseObjectList.appendChild(link);
+    link.href =  "/browse/" + type + "/" + feature.osm_id + "/history";
+    link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.show_history')));
+    link.onclick = OpenLayers.Function.bind(loadHistory, {
+      type: type, feature: feature, link: link
+    });
 
-    $("#browse_content").html(browseObjectList); 
-  }
-}
-    
-function viewFeatureLink() {
-  var layer = this.feature.layer;
+    div.appendChild(link);
 
-  for (var i = 0; i < layer.selectedFeatures.length; i++) {
-    var f = layer.selectedFeatures[i]; 
-    layer.drawFeature(f, layer.styleMap.createSymbolizer(f, "default"));
+    // Stash the currently drawn feature
+    browseActiveFeature = feature;
   }
 
-  onFeatureSelect(this.feature);
+  function loadHistory() {
+    this.link.href = "";
+    this.link.innerHTML = I18n.t('browse.start_rjs.wait');
 
-  if (browseMode != "auto") {
-    map.setCenter(this.feature.geometry.getBounds().getCenterLonLat()); 
+    $.ajax("/api/" + OSM.API_VERSION + "/" + this.type + "/" + this.feature.osm_id + "/history", {
+      complete: OpenLayers.Function.bind(displayHistory, this)
+    });
+
+    return false;
   }
 
-  return false;
-}
-    
-function loadObjectList() {
-  $("#browse_content").empty();
-  $("#browse_content").append(browseObjectList);
+  function displayHistory(request) {
+    if (browseActiveFeature.osm_id != this.feature.osm_id || $("#browse_content").firstChild == browseObjectList)  {
+        return false;
+    }
 
-  return false;
-}
-      
-function onFeatureSelect(feature) {
-  // Unselect previously selected feature
-  if (browseActiveFeature) {
-    browseActiveFeature.layer.drawFeature(
-      browseActiveFeature, 
-      browseActiveFeature.layer.styleMap.createSymbolizer(browseActiveFeature, "default")
-    );
+    this.link.parentNode.removeChild(this.link);
+
+    var doc = request.responseXML;
+
+    var table = document.createElement("table");
+    table.width = "100%";
+    table.className = "browse_heading";
+    $("#browse_content").append(table);
+
+    var tr = document.createElement("tr");
+    table.appendChild(tr);
+
+    var heading = document.createElement("td");
+    heading.appendChild(document.createTextNode(I18n.t("browse.start_rjs.history_for_feature", { feature: featureNameHistory(this.feature) })));
+    tr.appendChild(heading);
+
+    var td = document.createElement("td");
+    td.align = "right";
+    tr.appendChild(td);
+
+    var link = document.createElement("a");
+    link.href = "/browse/" + this.type + "/" + this.feature.osm_id + "/history";
+    link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.details')));
+    td.appendChild(link);
+
+    var div = document.createElement("div");
+    div.className = "browse_details";
+
+    var nodes = doc.getElementsByTagName(this.type);
+    var history = document.createElement("ul");
+    for (var i = nodes.length - 1; i >= 0; i--) {
+      var user = nodes[i].getAttribute("user") || I18n.t('browse.start_rjs.private_user');
+      var timestamp = nodes[i].getAttribute("timestamp");
+      var item = document.createElement("li");
+      item.appendChild(document.createTextNode(I18n.t("browse.start_rjs.edited_by_user_at_timestamp", { user: user, timestamp: timestamp })));
+      history.appendChild(item);
+    }
+    div.appendChild(history);
+
+    $("#browse_content").append(div);
   }
 
-  // Redraw in selected style
-  feature.layer.drawFeature(
-    feature, feature.layer.styleMap.createSymbolizer(feature, "select")
-  );
-
-  // If the current object is the list, don't innerHTML="", since that could clear it.
-  if ($("#browse_content").firstChild == browseObjectList) { 
-    $("#browse_content").removeChild(browseObjectList);
-  } else { 
-    $("#browse_content").empty();
-  }   
-        
-  // Create a link back to the object list
-  var div = document.createElement("div");
-  div.style.textAlign = "center";
-  div.style.marginBottom = "20px";
-  $("#browse_content").append(div);
-  var link = document.createElement("a");
-  link.href = "#";
-  link.onclick = loadObjectList;
-  link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.back')));
-  div.appendChild(link);
-
-  var table = document.createElement("table");
-  table.width = "100%";
-  table.className = "browse_heading";
-  $("#browse_content").append(table);
-
-  var tr = document.createElement("tr");
-  table.appendChild(tr);
-
-  var heading = document.createElement("td");
-  heading.appendChild(document.createTextNode(featureNameSelect(feature)));
-  tr.appendChild(heading);
-
-  var td = document.createElement("td");
-  td.align = "right";
-  tr.appendChild(td);
-
-  var type = featureType(feature);
-  var link = document.createElement("a");   
-  link.href = "/browse/" + type + "/" + feature.osm_id;
-  link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.object_list.details')));
-  td.appendChild(link);
-
-  var div = document.createElement("div");
-  div.className = "browse_details";
-
-  $("#browse_content").append(div);
-
-  // Now the list of attributes
-  var ul = document.createElement("ul");
-  for (var key in feature.attributes) {
-    var li = document.createElement("li");
-    var b = document.createElement("b");
-    b.appendChild(document.createTextNode(key));
-    li.appendChild(b);
-    li.appendChild(document.createTextNode(": " + feature.attributes[key]));
-    ul.appendChild(li);
+  function featureType(feature) {
+    if (feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
+      return "node";
+    } else {
+      return "way";
+    }
   }
-        
-  div.appendChild(ul);
-        
-  var link = document.createElement("a");   
-  link.href =  "/browse/" + type + "/" + feature.osm_id + "/history";
-  link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.show_history')));
-  link.onclick = OpenLayers.Function.bind(loadHistory, {
-    type: type, feature: feature, link: link
-  });
-        
-  div.appendChild(link);
 
-  // Stash the currently drawn feature
-  browseActiveFeature = feature; 
-}   
-
-function loadHistory() {
-  this.link.href = "";
-  this.link.innerHTML = I18n.t('browse.start_rjs.wait');
-
-  $.ajax("/api/" + OSM.API_VERSION + "/" + this.type + "/" + this.feature.osm_id + "/history", {
-    complete: OpenLayers.Function.bind(displayHistory, this)
-  });
-
-  return false;
-}
-
-function displayHistory(request) {
-  if (browseActiveFeature.osm_id != this.feature.osm_id || $("#browse_content").firstChild == browseObjectList)  { 
-      return false;
-  } 
-
-  this.link.parentNode.removeChild(this.link);
-
-  var doc = request.responseXML;
-
-  var table = document.createElement("table");
-  table.width = "100%";
-  table.className = "browse_heading";
-  $("#browse_content").append(table);
-
-  var tr = document.createElement("tr");
-  table.appendChild(tr);
-
-  var heading = document.createElement("td");
-  heading.appendChild(document.createTextNode(I18n.t("browse.start_rjs.history_for_feature", { feature: featureNameHistory(this.feature) })));
-  tr.appendChild(heading);
-
-  var td = document.createElement("td");
-  td.align = "right";
-  tr.appendChild(td);
-
-  var link = document.createElement("a");   
-  link.href = "/browse/" + this.type + "/" + this.feature.osm_id + "/history";
-  link.appendChild(document.createTextNode(I18n.t('browse.start_rjs.details')));
-  td.appendChild(link);
-
-  var div = document.createElement("div");
-  div.className = "browse_details";
-
-  var nodes = doc.getElementsByTagName(this.type);
-  var history = document.createElement("ul");  
-  for (var i = nodes.length - 1; i >= 0; i--) {
-    var user = nodes[i].getAttribute("user") || I18n.t('browse.start_rjs.private_user');
-    var timestamp = nodes[i].getAttribute("timestamp");
-    var item = document.createElement("li");
-    item.appendChild(document.createTextNode(I18n.t("browse.start_rjs.edited_by_user_at_timestamp", { user: user, timestamp: timestamp })));
-    history.appendChild(item);
+  function featureTypeName(feature) {
+    if (featureType(feature) == "node") {
+      return I18n.t('browse.start_rjs.object_list.type.node');
+    } else if (featureType(feature) == "way") {
+      return I18n.t('browse.start_rjs.object_list.type.way');
+    }
   }
-  div.appendChild(history);
 
-  $("#browse_content").append(div); 
-}
+  function featureName(feature) {
+    var lang = $('html').attr('lang');
+    if (feature.attributes['name:' + lang]) {
+      return feature.attributes['name:' + lang];
+    } else if (feature.attributes.name) {
+      return feature.attributes.name;
+    } else {
+      return feature.osm_id;
+    }
+  }
 
-function featureType(feature) {
-  if (feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
-    return "node";
-  } else {
-    return "way";
+  function featureNameSelect(feature) {
+    var lang = $('html').attr('lang');
+    if (feature.attributes['name:' + lang]) {
+      return feature.attributes['name:' + lang];
+    } else if (feature.attributes.name) {
+      return feature.attributes.name;
+    } else if (featureType(feature) == "node") {
+      return I18n.t("browse.start_rjs.object_list.selected.type.node", { id: feature.osm_id });
+    } else if (featureType(feature) == "way") {
+      return I18n.t("browse.start_rjs.object_list.selected.type.way", { id: feature.osm_id });
+    }
+  }
+
+  function featureNameHistory(feature) {
+    var lang = $('html').attr('lang');
+    if (feature.attributes['name:' + lang]) {
+      return feature.attributes['name:' + lang];
+    } else if (feature.attributes.name) {
+      return feature.attributes.name;
+    } else if (featureType(feature) == "node") {
+      return I18n.t("browse.start_rjs.object_list.history.type.node", { id: feature.osm_id });
+    } else if (featureType(feature) == "way") {
+      return I18n.t("browse.start_rjs.object_list.history.type.way", { id: feature.osm_id });
+    }
+  }
+
+  function setStatus(status) {
+    $("#browse_status").html(status);
+    $("#browse_status").show();
+  }
+
+  function clearStatus() {
+    $("#browse_status").html("");
+    $("#browse_status").hide();
   }
 }
-
-function featureTypeName(feature) {
-  if (featureType(feature) == "node") {
-    return I18n.t('browse.start_rjs.object_list.type.node');
-  } else if (featureType(feature) == "way") {
-    return I18n.t('browse.start_rjs.object_list.type.way');
-  }
-}
-
-function featureName(feature) {
-  var lang = $('html').attr('lang');
-  if (feature.attributes['name:' + lang]) {
-    return feature.attributes['name:' + lang];
-  } else if (feature.attributes.name) {
-    return feature.attributes.name;
-  } else {
-    return feature.osm_id;
-  }
-}
-
-function featureNameSelect(feature) {
-  var lang = $('html').attr('lang');
-  if (feature.attributes['name:' + lang]) {
-    return feature.attributes['name:' + lang];
-  } else if (feature.attributes.name) {
-    return feature.attributes.name;
-  } else if (featureType(feature) == "node") {
-    return I18n.t("browse.start_rjs.object_list.selected.type.node", { id: feature.osm_id });
-  } else if (featureType(feature) == "way") {
-    return I18n.t("browse.start_rjs.object_list.selected.type.way", { id: feature.osm_id });
-  }
-}
-
-function featureNameHistory(feature) {
-  var lang = $('html').attr('lang');
-  if (feature.attributes['name:' + lang]) {
-    return feature.attributes['name:' + lang];
-  } else if (feature.attributes.name) {
-    return feature.attributes.name;
-  } else if (featureType(feature) == "node") {
-    return I18n.t("browse.start_rjs.object_list.history.type.node", { id: feature.osm_id });
-  } else if (featureType(feature) == "way") {
-    return I18n.t("browse.start_rjs.object_list.history.type.way", { id: feature.osm_id });
-  }
-}
-
-function setStatus(status) {
-  $("#browse_status").html(status);
-  $("#browse_status").show();
-}
-  
-function clearStatus() {
-  $("#browse_status").html("");
-  $("#browse_status").hide();
-}
diff --git a/app/assets/javascripts/export.js b/app/assets/javascripts/export.js
index bc1a87910..a1953a130 100644
--- a/app/assets/javascripts/export.js
+++ b/app/assets/javascripts/export.js
@@ -1,10 +1,10 @@
-var vectors;
-var box;
-var transform;
-var markerLayer;
-var markerControl;
-
 function startExport(sidebarHtml) {
+  var vectors;
+  var box;
+  var transform;
+  var markerLayer;
+  var markerControl;
+
   vectors = new OpenLayers.Layer.Vector("Vector Layer", {
     displayInLayerSwitcher: false
   });
@@ -60,273 +60,273 @@ function startExport(sidebarHtml) {
 
   $("#viewanchor").removeClass("active");
   $("#exportanchor").addClass("active");
-}
 
-function stopExport() {
-  $("#viewanchor").addClass("active");
-  $("#exportanchor").removeClass("active");
-
-  clearBox();
-  clearMarker();
-  map.events.unregister("moveend", map, mapMoved);
-  map.events.unregister("changebaselayer", map, htmlUrlChanged);
-  map.removeLayer(vectors);
-}
-
-function boundsChanged() {
-  var epsg4326 = new OpenLayers.Projection("EPSG:4326");
-  var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(),
-                                     $("#maxlon").val(), $("#maxlat").val());
-
-  bounds.transform(epsg4326, map.getProjectionObject());
-
-  map.events.unregister("moveend", map, mapMoved);
-  map.zoomToExtent(bounds);
-
-  clearBox();
-  drawBox(bounds);
-
-  validateControls();
-  mapnikSizeChanged();
-}
-
-function startDrag() {
-  $("#drag_box").html(I18n.t('export.start_rjs.drag_a_box'));
-
-  clearBox();
-  box.activate();
-};
-
-function endDrag(bbox) {
-  var bounds = bbox.getBounds();
-
-  map.events.unregister("moveend", map, mapMoved);
-  setBounds(bounds);
-  drawBox(bounds);
-  box.deactivate();
-  validateControls();
-
-  $("#drag_box").html(I18n.t('export.start_rjs.manually_select'));
-}
-
-function transformComplete(event) {
-  setBounds(event.feature.geometry.bounds);
-  validateControls();
-}
-
-function startMarker() {
-  $("#add_marker").html(I18n.t('export.start_rjs.click_add_marker'));
-
-  if (!markerLayer) {
-    markerLayer = new OpenLayers.Layer.Vector("",{
-      displayInLayerSwitcher: false,
-      style: {
-        externalGraphic: OpenLayers.Util.getImageLocation("marker.png"),
-        graphicXOffset: -10.5,
-        graphicYOffset: -25,
-        graphicWidth: 21,
-        graphicHeight: 25
-      }
-    });
-    map.addLayer(markerLayer);
-
-    markerControl = new OpenLayers.Control.DrawFeature(markerLayer, OpenLayers.Handler.Point);
-    map.addControl(markerControl);
-
-    markerLayer.events.on({ "featureadded": endMarker });
-  }
-
-  markerLayer.destroyFeatures();
-  markerControl.activate();
-
-  return false;
-}
-
-function endMarker(event) {
-  markerControl.deactivate();
-
-  $("#add_marker").html(I18n.t('export.start_rjs.change_marker'));
-  $("#marker_inputs").show();
-
-  var epsg4326 = new OpenLayers.Projection("EPSG:4326");
-  var epsg900913 = new OpenLayers.Projection("EPSG:900913");
-  var geom = event.feature.geometry.clone().transform(epsg900913, epsg4326);
-
-  $("#marker_lon").val(geom.x.toFixed(5));
-  $("#marker_lat").val(geom.y.toFixed(5));
-
-  htmlUrlChanged();
-}
-
-function clearMarker() {
-  $("#marker_lon").val("");
-  $("#marker_lat").val("");
-  $("#marker_inputs").hide();
-  $("#add_marker").html(I18n.t('export.start_rjs.add_marker'));
-
-  if (markerLayer) {
-    markerControl.destroy();
-    markerLayer.destroy();
-    markerLayer = null;
-    markerControl = null;
-  }
-}
-
-function mapMoved() {
-  setBounds(map.getExtent());
-  validateControls();
-}
-
-function setBounds(bounds) {
-  var epsg4326 = new OpenLayers.Projection("EPSG:4326");
-  var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
-
-  bounds = bounds.clone().transform(map.getProjectionObject(), epsg4326);
-
-  $("#minlon").val(Math.round(bounds.left * decimals) / decimals);
-  $("#minlat").val(Math.round(bounds.bottom * decimals) / decimals);
-  $("#maxlon").val(Math.round(bounds.right * decimals) / decimals);
-  $("#maxlat").val(Math.round(bounds.top * decimals) / decimals);
-
-  mapnikSizeChanged();
-  htmlUrlChanged();
-}
-
-function clearBox() {
-  transform.deactivate();
-  vectors.destroyFeatures();
-}
-
-function drawBox(bounds) {
-  var feature = new OpenLayers.Feature.Vector(bounds.toGeometry());
-
-  vectors.addFeatures(feature);
-  transform.setFeature(feature);
-}
-
-function validateControls() {
-  var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
-
-  if (bounds.getWidth() * bounds.getHeight() > OSM.MAX_REQUEST_AREA) {
-    $("#export_osm_too_large").show();
-  } else {
-    $("#export_osm_too_large").hide();
-  }
-
-  var max_scale = maxMapnikScale();
-  var disabled = true;
-
-  if ($("#format_osm").prop("checked")) {
-    disabled = bounds.getWidth() * bounds.getHeight() > OSM.MAX_REQUEST_AREA;
-  } else if ($("#format_mapnik").prop("checked")) {
-    disabled = $("#mapnik_scale").val() < max_scale;
-  }
-
-  $("#export_commit").prop("disabled", disabled);
-  $("#mapnik_max_scale").html(roundScale(max_scale));
-}
-
-function htmlUrlChanged() {
-  var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
-  var layerName = map.baseLayer.keyid;
-  var url = "http://" + OSM.SERVER_URL + "/export/embed.html?bbox=" + bounds.toBBOX() + "&amp;layer=" + layerName;
-  var markerUrl = "";
-
-  if ($("#marker_lat").val() && $("#marker_lon").val()) {
-    markerUrl = "&amp;mlat=" + $("#marker_lat").val() + "&amp;mlon=" + $("#marker_lon").val();
-    url += "&amp;marker=" + $("#marker_lat").val() + "," + $("#marker_lon").val();
-  }
-
-  var html = '<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="'+url+'" style="border: 1px solid black"></iframe>';
-
-  // Create "larger map" link
-  var center = bounds.getCenterLonLat();
-  var epsg4326 = new OpenLayers.Projection("EPSG:4326");
-  var epsg900913 = new OpenLayers.Projection("EPSG:900913");
-
-  bounds.transform(epsg4326, epsg900913);
-  var zoom = map.getZoomForExtent(bounds);
-
-  var layers = getMapLayers();
-
-  var text = I18n.t('export.start_rjs.view_larger_map');
-  var escaped = [];
-
-  for (var i = 0; i < text.length; ++i) {
-    var c = text.charCodeAt(i);
-    escaped.push(c < 127 ? text.charAt(i) : "&#" + c + ";");
-  }
-
-  html += '<br /><small><a href="http://' + OSM.SERVER_URL + '/?lat='+center.lat+'&amp;lon='+center.lon+'&amp;zoom='+zoom+'&amp;layers='+layers+markerUrl+'">'+escaped.join("")+'</a></small>';
-
-  $("#export_html_text").val(html);
-
-  if ($("#format_html").prop("checked")) {
-    $("#export_html_text").prop("selected", true);
-  }
-}
-
-function formatChanged() {
-  $("#export_commit").show();
-
-  if ($("#format_osm").prop("checked")) {
-    $("#export_osm").show();
-  } else {
-    $("#export_osm").hide();
-  }
-
-  if ($("#format_mapnik").prop("checked")) {
-    $("#mapnik_scale").val(roundScale(map.getScale()));
-    $("#export_mapnik").show();
-  } else {
-    $("#export_mapnik").hide();
-  }
-
-  if ($("#format_html").prop("checked")) {
-    $("#export_html").show();
-    $("#export_commit").hide();
-    $("#export_html_text").prop("selected", true);
-  } else {
-    $("#export_html").hide();
+  function stopExport() {
+    $("#viewanchor").addClass("active");
+    $("#exportanchor").removeClass("active");
 
+    clearBox();
     clearMarker();
+    map.events.unregister("moveend", map, mapMoved);
+    map.events.unregister("changebaselayer", map, htmlUrlChanged);
+    map.removeLayer(vectors);
   }
 
-  validateControls();
-}
-
-function maxMapnikScale() {
-  var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
-  var epsg4326 = new OpenLayers.Projection("EPSG:4326");
-  var epsg900913 = new OpenLayers.Projection("EPSG:900913");
-
-  bounds.transform(epsg4326, epsg900913);
-
-  return Math.floor(Math.sqrt(bounds.getWidth() * bounds.getHeight() / 0.3136));
-}
-
-function mapnikImageSize(scale) {
-  var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
-  var epsg4326 = new OpenLayers.Projection("EPSG:4326");
-  var epsg900913 = new OpenLayers.Projection("EPSG:900913");
-
-  bounds.transform(epsg4326, epsg900913);
-
-  return new OpenLayers.Size(Math.round(bounds.getWidth() / scale / 0.00028),
-                             Math.round(bounds.getHeight() / scale / 0.00028));
-}
-
-function roundScale(scale) {
-  var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);
-
-  return precision * Math.ceil(scale / precision);
-}
-
-function mapnikSizeChanged() {
-  var size = mapnikImageSize($("#mapnik_scale").val());
-
-  $("#mapnik_image_width").html(size.w);
-  $("#mapnik_image_height").html(size.h);
-
-  validateControls();
+  function boundsChanged() {
+    var epsg4326 = new OpenLayers.Projection("EPSG:4326");
+    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(),
+                                       $("#maxlon").val(), $("#maxlat").val());
+
+    bounds.transform(epsg4326, map.getProjectionObject());
+
+    map.events.unregister("moveend", map, mapMoved);
+    map.zoomToExtent(bounds);
+
+    clearBox();
+    drawBox(bounds);
+
+    validateControls();
+    mapnikSizeChanged();
+  }
+
+  function startDrag() {
+    $("#drag_box").html(I18n.t('export.start_rjs.drag_a_box'));
+
+    clearBox();
+    box.activate();
+  };
+
+  function endDrag(bbox) {
+    var bounds = bbox.getBounds();
+
+    map.events.unregister("moveend", map, mapMoved);
+    setBounds(bounds);
+    drawBox(bounds);
+    box.deactivate();
+    validateControls();
+
+    $("#drag_box").html(I18n.t('export.start_rjs.manually_select'));
+  }
+
+  function transformComplete(event) {
+    setBounds(event.feature.geometry.bounds);
+    validateControls();
+  }
+
+  function startMarker() {
+    $("#add_marker").html(I18n.t('export.start_rjs.click_add_marker'));
+
+    if (!markerLayer) {
+      markerLayer = new OpenLayers.Layer.Vector("",{
+        displayInLayerSwitcher: false,
+        style: {
+          externalGraphic: OpenLayers.Util.getImageLocation("marker.png"),
+          graphicXOffset: -10.5,
+          graphicYOffset: -25,
+          graphicWidth: 21,
+          graphicHeight: 25
+        }
+      });
+      map.addLayer(markerLayer);
+
+      markerControl = new OpenLayers.Control.DrawFeature(markerLayer, OpenLayers.Handler.Point);
+      map.addControl(markerControl);
+
+      markerLayer.events.on({ "featureadded": endMarker });
+    }
+
+    markerLayer.destroyFeatures();
+    markerControl.activate();
+
+    return false;
+  }
+
+  function endMarker(event) {
+    markerControl.deactivate();
+
+    $("#add_marker").html(I18n.t('export.start_rjs.change_marker'));
+    $("#marker_inputs").show();
+
+    var epsg4326 = new OpenLayers.Projection("EPSG:4326");
+    var epsg900913 = new OpenLayers.Projection("EPSG:900913");
+    var geom = event.feature.geometry.clone().transform(epsg900913, epsg4326);
+
+    $("#marker_lon").val(geom.x.toFixed(5));
+    $("#marker_lat").val(geom.y.toFixed(5));
+
+    htmlUrlChanged();
+  }
+
+  function clearMarker() {
+    $("#marker_lon").val("");
+    $("#marker_lat").val("");
+    $("#marker_inputs").hide();
+    $("#add_marker").html(I18n.t('export.start_rjs.add_marker'));
+
+    if (markerLayer) {
+      markerControl.destroy();
+      markerLayer.destroy();
+      markerLayer = null;
+      markerControl = null;
+    }
+  }
+
+  function mapMoved() {
+    setBounds(map.getExtent());
+    validateControls();
+  }
+
+  function setBounds(bounds) {
+    var epsg4326 = new OpenLayers.Projection("EPSG:4326");
+    var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
+
+    bounds = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+
+    $("#minlon").val(Math.round(bounds.left * decimals) / decimals);
+    $("#minlat").val(Math.round(bounds.bottom * decimals) / decimals);
+    $("#maxlon").val(Math.round(bounds.right * decimals) / decimals);
+    $("#maxlat").val(Math.round(bounds.top * decimals) / decimals);
+
+    mapnikSizeChanged();
+    htmlUrlChanged();
+  }
+
+  function clearBox() {
+    transform.deactivate();
+    vectors.destroyFeatures();
+  }
+
+  function drawBox(bounds) {
+    var feature = new OpenLayers.Feature.Vector(bounds.toGeometry());
+
+    vectors.addFeatures(feature);
+    transform.setFeature(feature);
+  }
+
+  function validateControls() {
+    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
+
+    if (bounds.getWidth() * bounds.getHeight() > OSM.MAX_REQUEST_AREA) {
+      $("#export_osm_too_large").show();
+    } else {
+      $("#export_osm_too_large").hide();
+    }
+
+    var max_scale = maxMapnikScale();
+    var disabled = true;
+
+    if ($("#format_osm").prop("checked")) {
+      disabled = bounds.getWidth() * bounds.getHeight() > OSM.MAX_REQUEST_AREA;
+    } else if ($("#format_mapnik").prop("checked")) {
+      disabled = $("#mapnik_scale").val() < max_scale;
+    }
+
+    $("#export_commit").prop("disabled", disabled);
+    $("#mapnik_max_scale").html(roundScale(max_scale));
+  }
+
+  function htmlUrlChanged() {
+    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
+    var layerName = map.baseLayer.keyid;
+    var url = "http://" + OSM.SERVER_URL + "/export/embed.html?bbox=" + bounds.toBBOX() + "&amp;layer=" + layerName;
+    var markerUrl = "";
+
+    if ($("#marker_lat").val() && $("#marker_lon").val()) {
+      markerUrl = "&amp;mlat=" + $("#marker_lat").val() + "&amp;mlon=" + $("#marker_lon").val();
+      url += "&amp;marker=" + $("#marker_lat").val() + "," + $("#marker_lon").val();
+    }
+
+    var html = '<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="'+url+'" style="border: 1px solid black"></iframe>';
+
+    // Create "larger map" link
+    var center = bounds.getCenterLonLat();
+    var epsg4326 = new OpenLayers.Projection("EPSG:4326");
+    var epsg900913 = new OpenLayers.Projection("EPSG:900913");
+
+    bounds.transform(epsg4326, epsg900913);
+    var zoom = map.getZoomForExtent(bounds);
+
+    var layers = getMapLayers();
+
+    var text = I18n.t('export.start_rjs.view_larger_map');
+    var escaped = [];
+
+    for (var i = 0; i < text.length; ++i) {
+      var c = text.charCodeAt(i);
+      escaped.push(c < 127 ? text.charAt(i) : "&#" + c + ";");
+    }
+
+    html += '<br /><small><a href="http://' + OSM.SERVER_URL + '/?lat='+center.lat+'&amp;lon='+center.lon+'&amp;zoom='+zoom+'&amp;layers='+layers+markerUrl+'">'+escaped.join("")+'</a></small>';
+
+    $("#export_html_text").val(html);
+
+    if ($("#format_html").prop("checked")) {
+      $("#export_html_text").prop("selected", true);
+    }
+  }
+
+  function formatChanged() {
+    $("#export_commit").show();
+
+    if ($("#format_osm").prop("checked")) {
+      $("#export_osm").show();
+    } else {
+      $("#export_osm").hide();
+    }
+
+    if ($("#format_mapnik").prop("checked")) {
+      $("#mapnik_scale").val(roundScale(map.getScale()));
+      $("#export_mapnik").show();
+    } else {
+      $("#export_mapnik").hide();
+    }
+
+    if ($("#format_html").prop("checked")) {
+      $("#export_html").show();
+      $("#export_commit").hide();
+      $("#export_html_text").prop("selected", true);
+    } else {
+      $("#export_html").hide();
+
+      clearMarker();
+    }
+
+    validateControls();
+  }
+
+  function maxMapnikScale() {
+    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
+    var epsg4326 = new OpenLayers.Projection("EPSG:4326");
+    var epsg900913 = new OpenLayers.Projection("EPSG:900913");
+
+    bounds.transform(epsg4326, epsg900913);
+
+    return Math.floor(Math.sqrt(bounds.getWidth() * bounds.getHeight() / 0.3136));
+  }
+
+  function mapnikImageSize(scale) {
+    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
+    var epsg4326 = new OpenLayers.Projection("EPSG:4326");
+    var epsg900913 = new OpenLayers.Projection("EPSG:900913");
+
+    bounds.transform(epsg4326, epsg900913);
+
+    return new OpenLayers.Size(Math.round(bounds.getWidth() / scale / 0.00028),
+                               Math.round(bounds.getHeight() / scale / 0.00028));
+  }
+
+  function roundScale(scale) {
+    var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);
+
+    return precision * Math.ceil(scale / precision);
+  }
+
+  function mapnikSizeChanged() {
+    var size = mapnikImageSize($("#mapnik_scale").val());
+
+    $("#mapnik_image_width").html(size.w);
+    $("#mapnik_image_height").html(size.h);
+
+    validateControls();
+  }
 }