Index: branches/unlabeled/unlabeled-1.15.2/kernel/admin_templates/incs/script.js
===================================================================
diff -u -r4382 -r4531
--- branches/unlabeled/unlabeled-1.15.2/kernel/admin_templates/incs/script.js	(.../script.js)	(revision 4382)
+++ branches/unlabeled/unlabeled-1.15.2/kernel/admin_templates/incs/script.js	(.../script.js)	(revision 4531)
@@ -800,13 +800,14 @@
 		$src_option.innerHTML = $src_html;
 	}
 
-	function getXMLHTTPObject()
+	function getXMLHTTPObject(content_type)
     {
+    	if (!isset(content_type)) content_type = 'text/plain';
     	var http_request = false;
         if (window.XMLHttpRequest) { // Mozilla, Safari,...
             http_request = new XMLHttpRequest();
             if (http_request.overrideMimeType) {
-                http_request.overrideMimeType('text/plain');
+                http_request.overrideMimeType(content_type);
                 // See note below about this line
             }
         } else if (window.ActiveXObject) { // IE