diff --git a/includes/common.inc b/includes/common.inc
index 87ab7640c138dec82465314a5fed1ab61b8bfc97..448cf5f09520edb131d853901ddb44b435762fad 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -484,8 +484,8 @@ function xss_check_input_data($data) {
     */
 
     // check attributes:
-    $match  = preg_match("/\W(style|dynsrc|datasrc|data|lowsrc|on[a-z]+)\s*=[^>]+?>/i", $data);
-    $match += preg_match("/\W(src|href)\s*=[\s'\"]*javascript[^>]+?>/i", $data);
+    $match  = preg_match("/\W(dynsrc|datasrc|data|lowsrc|on[a-z]+)\s*=[^>]+?>/i", $data);
+    $match += preg_match("/\Wjavascript\s*:/i", $data);
 
     // check tags:
     $match += preg_match("/<\s*(applet|script|object|style|embed|form|blink|meta|html|frame|iframe|layer|ilayer|head|frameset|xml)/i", $data);