+Ext.Loader = Ext.apply({}, {
+
+ load: function(fileList, callback, scope, preserveOrder) {
+ var scope = scope || this,
+ head = document.getElementsByTagName("head")[0],
+ fragment = document.createDocumentFragment(),
+ numFiles = fileList.length,
+ loadedFiles = 0,
+ me = this;
+
+
+ var loadFileIndex = function(index) {
+ head.appendChild(
+ me.buildScriptTag(fileList[index], onFileLoaded)
+ );
+ };
+
+
+ var onFileLoaded = function() {
+ loadedFiles ++;
+
+
+ if (numFiles == loadedFiles && typeof callback == 'function') {
+ callback.call(scope);
+ } else {
+ if (preserveOrder === true) {
+ loadFileIndex(loadedFiles);
+ }
+ }
+ };
+
+ if (preserveOrder === true) {
+ loadFileIndex.call(this, 0);
+ } else {
+
+ Ext.each(fileList, function(file, index) {
+ fragment.appendChild(
+ this.buildScriptTag(file, onFileLoaded)
+ );
+ }, this);
+
+ head.appendChild(fragment);
+ }
+ },
+
+
+ buildScriptTag: function(filename, callback) {
+ var script = document.createElement('script');
+ script.type = "text/javascript";
+ script.src = filename;
+
+
+ if (script.readyState) {
+ script.onreadystatechange = function() {
+ if (script.readyState == "loaded" || script.readyState == "complete") {
+ script.onreadystatechange = null;
+ callback();
+ }
+ };
+ } else {
+ script.onload = callback;
+ }
+
+ return script;
+ }
+});
+