function popup(mylink, windowname, wert)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
if (wert == 0)
	window.open(href, windowname, 'width=600,height=300,scrollbars=yes');
else
	window.open(href, windowname, 'width=660,height=500,scrollbars=yes');
return false;
}