<script   language="javascript">   
 
  function   ok(rURL)   
  {   
        document.form1.action   =   rURL;   
        document.form1.submit();   
  }   
   
  </script>   
    
  <form   name="form1"   method="post">   
  <input   type="image"   value="OK1"   name="OK1" src=submit.gif  onClick="ok('URL1.html');">   
  <input   type="image"   value="OK2"   name="OK2"  src=return.gif onClick="ok('URL2.html');">   
  </form>