var newwindow = ''
function popitup(url) 
{
   if (newwindow.location && !newwindow.closed) 
   {
	  newwindow.location.href = url; 
	  newwindow.focus(); 
   }  
   else 
   { 
	  newwindow=window.open(url,'RMA_TOOL','width=470,height=610,resizable=0,scrollbars=0');
   } 
}