function AddUrlSeparator(url) {
   if (url.indexOf('?') == -1) {
      return url + '?'
   } else {
      return url + '&'
   }
}

function SubmitOnEnter(myfield,e,action)
{ 
   var keycode;
   
   if(window.event) // IE
   {
      keycode = e.keyCode
   } else if(e.which) // Netscape/Firefox/Opera
   {
      keycode = e.which
   } else {
      return true;
   }
   
   if (keycode == 13) {
      myfield.form.itemaction.value = action;
      myfield.form.submit();
      return false;
   } else {
      return true;
   }
}