if (typeof wScriptAlreadyLoaded === "undefined") {
  var wScriptAlreadyLoaded = true;

  // Array of popin translations
  var i8nMessages = [];
  i8nMessages['en_US'] = [];
  i8nMessages['fr_FR'] = [];
  i8nMessages['de_DE'] = [];
  i8nMessages['es_ES'] = [];
  i8nMessages['en_US']['iframe-error'] = 'Your browser does not support the IFrame element';
  i8nMessages['en_US']['close-popin'] = 'Close';
  i8nMessages['fr_FR']['iframe-error'] = 'Votre navigateur ne supporte pas l\'élément iframe';
  i8nMessages['fr_FR']['close-popin'] = 'Fermer';
  i8nMessages['de_DE']['iframe-error'] = 'Ihr navigator verträgt kein Element iframe';
  i8nMessages['de_DE']['close-popin'] = 'Schließen';
  i8nMessages['es_ES']['iframe-error'] = 'Su navegante no soporta el elemento iframe';
  i8nMessages['es_ES']['close-popin'] = 'Cerrarse';

  window.onload = function() {
      // Display popin when click event occure on widget button
      Array.prototype.forEach.call(document.getElementsByClassName("mj-w-btn"), function(btnNode) {
          btnNode.style.cursor = "pointer";
          btnNode.addEventListener("click", function(event) {
              mjOpenPopin(event, this);
          });
      });

     mjOpenPopin = function(event, element) {
          event.preventDefault();
          //event.stopPropagation();

          //var token = str.substring(btnNode.id.lastIndexOf("-") + 1, btnNode.id.length - btnNode.id.lastIndexOf("-"));
          var token = element.getAttribute("data-token");

          //Register parameters
          var widgetPopinData = document.querySelector(".mj-w-data[data-token='" + token + "']");
          if (widgetPopinData) {
            var apiKey = widgetPopinData.getAttribute("data-apikey");
            var wId = widgetPopinData.getAttribute("data-w-id");
            var locale = widgetPopinData.getAttribute("data-lang");
            var base = widgetPopinData.getAttribute("data-base");
            var width = widgetPopinData.getAttribute("data-width");
            var height = widgetPopinData.getAttribute("data-height");
            var statics = widgetPopinData.getAttribute("data-statics");

            // Call to Mailjet CSS file
            var cssFile = document.createElement("link");
            cssFile.setAttribute("rel", "stylesheet");
            cssFile.setAttribute("type", "text/css");
            if (statics) {
                base += "/" + statics;
            }
            cssFile.setAttribute("href", base + "/css/w-popin-less.css");
            document.getElementsByTagName("head")[0].appendChild(cssFile);

            var htmlCode = "<div id=\"mj-w-overlay\" style=\"display: none;\">" +
            "<div id=\"mj-w-popin-block\" style=\"max-width:" + width + "px; max-height:" + height + "px\">" +
            "<div id=\"mj-w-loader\"></div>" +
            "<img id=\"mj-w-close-img\" alt=\"" + i8nMessages[locale]['close-popin'] + "\" title=\"" + i8nMessages[locale]['close-popin'] + "\" src=\"" + base + "/images/w-popin-close.png\" style=\"display:none;\" />" +
            "<iframe id=\"mj-w-iframe\" src=\"" + base + "/widget/iframe/" + apiKey + "/" + wId + "\" scrolling=\"no\" width=\"100% \"   frameborder=\"0\" allotransparency=\"true\" style=\"background-color:transparent; border-radius:3px;height: 0px;\">" +
            "<p>" + i8nMessages[locale]['iframe-error'] + "</p>" +
            "</iframe>" +
            "</div>" +
            "</div>";

            widgetPopinData.innerHTML = htmlCode;

            document.getElementById("mj-w-iframe").onload = function() {

                document.getElementById("mj-w-iframe").style.height= height + "px";
                document.getElementById('mj-w-close-img').style.display = "block";
                document.getElementById("mj-w-loader").style.display = "none";
                document.getElementById("mj-w-popin-block").style.border = "none";
                if (window.matchMedia("(max-width: 767px)").matches) {
                    document.getElementById("mj-w-iframe").style.width = '100%';
                    document.getElementById("mj-w-popin-block").style.height = 'auto';
                    document.getElementById("mj-w-popin-block").style.width = '90%';
                }
            };

            var closeImgNode = document.getElementById("mj-w-close-img");
            closeImgNode.addEventListener("click", function(event) {
                closePopin();
                event.preventDefault();
            });

            document.addEventListener("keydown", escapeEvent);
            document.getElementById("mj-w-iframe").onclick=function(event){
                event.stopPropagation();
            };
            //document.addEventListener("click");

            document.getElementById("mj-w-overlay").style.display = "block";
            document.getElementById("mj-w-overlay").addEventListener("click", function(event){
                closePopin();
                event.preventDefault();
            });
          }
      }

      // Escape event : close popin
      function escapeEvent(e) {
          if (e.keyCode == 27) { // Escape key
              closePopin();
          }
      }

      // Close popin (remove popin HTML code)
      function closePopin() {
          var rootContainer = document.getElementById("mj-w-overlay");
          if(rootContainer) {
              rootContainer.parentNode.removeChild(rootContainer);
          }
          document.removeEventListener("keypress", escapeEvent);
      }

      window.onresize = function(event) {
          if (window.matchMedia("(max-width: 767px)").matches) {
              var popin = document.getElementById("mj-w-popin-block");
              var iframe = document.getElementById("mj-w-iframe");
              if (popin) {
                  popin.style.height = 'auto';
                  popin.style.width = '90%';
              }
              if (iframe) {
                  iframe.style.width = '100%';
              }
          }
      }

  };
}