function updatelinks(lon,lat,zoom) {
    var links = new Array();
    links['viewanchor'] = '/index.html';
    //links['editanchor'] = 'edit.html';
    links['uploadanchor'] = '/traces';
    links['loginanchor'] = '/login.html';
    links['logoutanchor'] = '/logout.html';
    links['registeranchor'] = '/create-account.html';
 
    var node;
    var anchor;
    for (anchor in links) {
	node = document.getElementById(anchor);
	if (! node) { continue; }
	node.href = links[anchor] + "?lat=" + lat + "&lon=" + lon + "&zoom=" + zoom;
    }

    node = document.getElementById("editanchor");
    if (node) {
    if ( zoom >= 14) {
        node.href = '/edit.html?lat=' + lat + '&lon=' + lon + "&zoom=" + zoom;
	node.style.fontStyle = 'normal';
    } else {
        node.href = 'javascript:alert("zoom in to edit map");';
	node.style.fontStyle = 'italic';
    }
    }
}