document.myform.action ... Won't Pass Variable

document.myform.action ... Won't Pass Variable

I am trying to pass the var delId  to AccountDelete.html. It will not pass successfully.

Appreciate any help to fix this!!!

=======================

Code which passes delId:

function OnSubmitForm() {

var Id=<?php echo $rowcopyId; ?>;
  
  if(document.pressed == 'Go Back')   {
   document.myform.action ="AccountsFrontEnd.php";
  }
   else
  if(document.pressed == 'Delete This Account')   {
        alert('AccountDelete.html?delId='+Id);   THIS SHOWS OK.   (Id=111)            
    document.myform.action='AccountDelete.html?delId='+Id;
  }
 
  return true;
}
 ============================

Code which accepts var delId:

    <script type="text/javascript" >

         var Name=unescape(getUrlParametersVals()['dname']);
         var revId=unescape(getUrlParametersVals()['delId']);
        
alert("line 16 delId = "+ revId);         SHOWS revId as UNDEFINED.    
        
    </script>