diff --git a/apps/files/js/jquery-visibility.js b/apps/files/js/jquery-visibility.js
index a824bf68730..18f57d1f2bd 100644
--- a/apps/files/js/jquery-visibility.js
+++ b/apps/files/js/jquery-visibility.js
@@ -3,7 +3,7 @@
 
 	var prefix,
 		property,
-// In Opera, `'onfocusin' in document == true`, hence the extra `hasFocus` check to detect IE-like behavior
+		// In Opera, `'onfocusin' in document == true`, hence the extra `hasFocus` check to detect IE-like behavior
 		eventName = 'onfocusin' in document && 'hasFocus' in document ? 'focusin focusout' : 'focus blur',
 		prefixes = ['', 'moz', 'ms', 'o', 'webkit'],
 		$support = $.support,
@@ -19,12 +19,11 @@
 
 	$(/blur$/.test(eventName) ? window : document).on(eventName, function (event) {
 		var type = event.type,
-			originalEvent = event.originalEvent,
-			toElement = originalEvent.toElement;
-// If it’s a `{focusin,focusout}` event (IE), `fromElement` and `toElement` should both be `null` or `undefined`;
-// else, the page visibility hasn’t changed, but the user just clicked somewhere in the doc.
-// In IE9, we need to check the `relatedTarget` property instead.
-		if (!/^focus./.test(type) || (toElement == undefined && originalEvent.fromElement == undefined && originalEvent.relatedTarget == undefined)) {
+			originalEvent = event.originalEvent;
+		// If it’s a `{focusin,focusout}` event (IE), `fromElement` and `toElement` should both be `null` or `undefined`;
+		// else, the page visibility hasn’t changed, but the user just clicked somewhere in the doc.
+		// In IE9, we need to check the `relatedTarget` property instead.
+		if (!/^focus./.test(type) || originalEvent == undefined || (originalEvent.toElement == undefined && originalEvent.fromElement == undefined && originalEvent.relatedTarget == undefined)) {
 			$event.trigger((property && document[property] || /^(?:blur|focusout)$/.test(type) ? 'hide' : 'show') + '.visibility');
 		}
 	});
diff --git a/core/js/compatibility.js b/core/js/compatibility.js
new file mode 100644
index 00000000000..0cfeefab871
--- /dev/null
+++ b/core/js/compatibility.js
@@ -0,0 +1,32 @@
+
+//https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/bind
+if (!Function.prototype.bind) {
+	Function.prototype.bind = function (oThis) {
+		if (typeof this !== "function") {
+			// closest thing possible to the ECMAScript 5 internal IsCallable function
+			throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
+		}
+
+		var aArgs = Array.prototype.slice.call(arguments, 1),
+			fToBind = this,
+			fNOP = function () {},
+			fBound = function () {
+				return fToBind.apply(this instanceof fNOP && oThis
+					? this
+					: oThis,
+					aArgs.concat(Array.prototype.slice.call(arguments)));
+			};
+
+		fNOP.prototype = this.prototype;
+		fBound.prototype = new fNOP();
+
+		return fBound;
+	};
+}
+
+//https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/Trim
+if(!String.prototype.trim) {
+	String.prototype.trim = function () {
+		return this.replace(/^\s+|\s+$/g,'');
+	};
+}
\ No newline at end of file
diff --git a/core/js/eventsource.js b/core/js/eventsource.js
index f783ade7ae9..ce8c8387c8e 100644
--- a/core/js/eventsource.js
+++ b/core/js/eventsource.js
@@ -87,8 +87,10 @@ OC.EventSource.prototype={
 	useFallBack:false,
 	fallBackCallBack:function(type,data){
 		if(type){
-			for(var i=0;i<this.listeners[type].length;i++){
-				this.listeners[type][i](data);
+			if (typeof this.listeners['done'] != 'undefined') {
+				for(var i=0;i<this.listeners[type].length;i++){
+					this.listeners[type][i](data);
+				}
 			}
 		}else{
 			for(var i=0;i<this.typelessListeners.length;i++){
@@ -117,6 +119,8 @@ OC.EventSource.prototype={
 		}
 	},
 	close:function(){
-		this.source.close();
+		if (typeof this.source !='undefined') {
+			this.source.close();
+		}
 	}
 }
diff --git a/lib/base.php b/lib/base.php
index c60a97100f4..fd9a1d41121 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -278,6 +278,7 @@ class OC {
 		OC_Util::addScript("jquery-showpassword");
 		OC_Util::addScript("jquery.infieldlabel");
 		OC_Util::addScript("jquery-tipsy");
+		OC_Util::addScript("compatibility");
 		OC_Util::addScript("oc-dialogs");
 		OC_Util::addScript("js");
 		OC_Util::addScript("eventsource");
diff --git a/settings/js/users.js b/settings/js/users.js
index a70cf18ead3..da18b4be836 100644
--- a/settings/js/users.js
+++ b/settings/js/users.js
@@ -92,11 +92,12 @@ var UserList = {
 			UserList.applyMultiplySelect(subadminSelect);
 		}
 		if (tr.find('td.remove img').length == 0 && OC.currentUser != username) {
-			var rm_img = $('<img>', {
-				class: 'svg action',
+			var rm_img = $('<img class="svg action">').attr({
 				src: OC.imagePath('core', 'actions/delete')
 			});
-			var rm_link = $('<a>', { class: 'action delete', href: '#', 'original-title': t('settings', 'Delete')}).append(rm_img);
+			var rm_link = $('<a class="action delete">')
+				.attr({ href: '#', 'original-title': t('settings', 'Delete')})
+				.append(rm_img);
 			tr.find('td.remove').append(rm_link);
 		} else if (OC.currentUser == username) {
 			tr.find('td.remove a').remove();