Fix the Minor-Bug!? for var oldOnclick=document.editform.wpSave.onclick; can we add (not replace) this event handler 

 if (window.addEventListener) ocument.editform.wpSave.addEventListener("click", oldOnclick, false);
 else if (window.attachEvent) ocument.editform.wpSave.attachEvent("onclick", oldOnclick);

We can also search() the "~~~" bevor and after, only if  is present!?