Revert "Tightened attribute check to cleanup."

This reverts commit ff5b9ac4.

include/utils/VtlibUtils.php

@@ -667,9 +667,8 @@ function purifyHtmlEventAttributes($value){
                         "onreset|onsearch|onselect|onsubmit|onkeydown|onkeypress|onkeyup|".
                         "onclick|ondblclick|ondrag|ondragend|ondragenter|ondragleave|ondragover|".
                         "ondragstart|ondrop|onmousedown|onmousemove|onmouseout|onmouseover|".
-						"onmouseup|onmousewheel|onscroll|onwheel|oncopy|oncut|onpaste|onload|".
-						"onselectionchange|onabort|onselectstart";
-    if(preg_match("/\s*(".$htmlEventAttributes.")\s*=/i", $value)) {
+                        "onmouseup|onmousewheel|onscroll|onwheel|oncopy|oncut|onpaste";
+    if(preg_match("/\s(".$htmlEventAttributes.")\s*=/i", $value)) {
         $value = str_replace("=", "=", $value);
     }
     return $value;