function document_onkeydown() {

   if (event.keyCode == 13) {

		if (typeof(window.HandleID) == 'function') {
			HandleID("default")
			event.returnValue=0;
         return true
       };
         	
      active = event.srcElement.name;
      
      with (document.forms[0]) {
         if (length >= 2) {
            if (elements[length-2].name == active) {
               HandleID("default")
               event.returnValue=0;
               return true
            }
            else
               event.keyCode = 9
            
			};
      };
   };
};