Add getfilename helper function; adapted checkInputs() to 2.0.

NOTE: checkInputs() is currently broken as I don't have time for
      further debugging right now. I assume it's broken due to
      changes to the upload form by jQueryfying addUploadField().

templates/2k11/admin/serendipity_editor.js.tpl

@@ -438,6 +438,8 @@ function treeToggleAll() {
 var inputStorage = new Array();
 
 function checkInputs() { 
+    var fieldcount = $('.uploadform_userfile').length;
+
     for (i = 1; i <= fieldcount; i++) { 
         if (!inputStorage[i]) { 
             fillInput(i, i);
@@ -475,6 +477,12 @@ function fillInput(source, target) {
     }
 }
 
+// Helper function for fillInput()
+function getfilename(value) { 
+    re = /^.+[\/\\]+?(.+)$/;
+    return value.replace(re, "$1"); 
+}
+
 // Hides the foreign upload form if batch upload is used (if more
 // images are added)
 function hideForeign() {