function checkajax(type, pid){ 
  if(document.getElementById('frm981')){ 
   if(type=='minus'){ 
    document.getElementById('a1').checked=true; 
   }else if(type=='plus'){ 
    document.getElementById('a2').checked=true; 
   } 
   clearInterval(time); 
   time = null; 
  } 
 }