function popup(mylink, windowname, top, left, width, height)
{
	if (! window.focus)
		return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width='+width+',height='+height+',scrollbars=yes,resizable=yes,top='+top+',left='+left);
	
	return false;
}