function popup(mylink, windowname, w, h)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
   settings='width='+w+',height='+h+'';
window.open(href, windowname, settings,'scrollbars=no');
return false;
}