Index: trunk/admin/include/mainscript.js
===================================================================
diff -u -N -r3145 -r3543
--- trunk/admin/include/mainscript.js	(.../mainscript.js)	(revision 3145)
+++ trunk/admin/include/mainscript.js	(.../mainscript.js)	(revision 3543)
@@ -153,6 +153,31 @@
 	if(\$window.parent) \$window = \$window.parent;
 	\$window.document.title = (main_title.length ? main_title + ' - ' : '') + \$title;
 }
+
+// sets hidden field value
+// if the field does not exist - creates it
+function set_hidden_field(\$field_id, \$value)
+{
+//	alert('form: '+\$form_prefix+'_form');
+
+	var \$kf = document.getElementById(\$form_prefix+'_form');
+	var \$field = \$kf.elements[\$field_id];
+	if(\$field)
+	{
+		\$field.value = \$value;
+		return true;
+	}
+
+	\$field = document.createElement('INPUT');
+	\$field.type = 'hidden';
+	\$field.name = \$field_id;
+	\$field.id = \$field_id;
+	\$field.value = \$value;
+
+	\$kf.appendChild(\$field);
+	return false;
+}
+
 var env = "$env2";
 </script>