Index: branches/5.2.x/core/admin_templates/js/uploader/uploader.js
===================================================================
diff -u -N -r15751 -r15754
--- branches/5.2.x/core/admin_templates/js/uploader/uploader.js	(.../uploader.js)	(revision 15751)
+++ branches/5.2.x/core/admin_templates/js/uploader/uploader.js	(.../uploader.js)	(revision 15754)
@@ -30,6 +30,19 @@
 
 	this.enableUploadButton();
 	this._attachEventHandler();
+
+	var $me = this;
+
+	if ( this.params.ajax ) {
+		$(document).bind('FormManager.WindowManager.Ready', function ($e) {
+			$me.init();
+		});
+	}
+	else {
+		$(document).ready(function() {
+			$me.init();
+		});
+	}
 }
 
 /* ==== Private methods ==== */
@@ -73,8 +86,9 @@
 		buttonDisabled : true, //false,
 		buttonCursor : -1, // ARROW : -1, HAND : -2
 		wmode : 'transparent', // "window", "transparent", "opaque"
-		buttonPlaceholderId: false
-	}
+		buttonPlaceholderId: false,
+		ajax: false
+	};
 
 	for (var $param_name in $defaults) {
 		if (this.params[$param_name] == null) {