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=yes,top=400,left=550,resizable=yes').focus(); 
return false;
}