var v=null; 
function openURL1(url) 
{ 
if (v) v.close(); 
v = window.open(url,'amvisor','toolbar=0,scrollbars=auto,location=0,statusbar=0,menubar=0,resizable=1,width=980,height=800,left=20,top=20'); 
v.focus(); 
return false; 
}