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=1000,height=600,scrollbars=yes,toolbar=no, resizable=yes, location=no, left=100, top=100' );
return false;
}