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=320,height=300, left=50,top=100,scrollbars=yes,resizable=yes');
return false;
}