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=450,height=450,menubars=0,location=no, toolbar=no,scrollbars=0');
return false;
}