function popup(mylink, windowname) 
{ 
if (! window.focus)return true; 
var href; 
if (typeof(mylink) == 'string') 
   href=mylink; 
else 
   href=mylink.href; 
window.open(href, windowname, 
'width=700,height=500,scrollbars=1,statusbar=1,left=25,top=15'); 
return false; 
}