<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />
 <input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />
function __doPostBack(eventTarget, eventArgument) {
     if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
         theForm.__EVENTTARGET.value = eventTarget;
         theForm.__EVENTARGUMENT.value = eventArgument;
         theForm.submit();
     }
 }