function popup(mylink, windowname, width, height) {
	
	//alert( width )
	//alert( height )
	
	if( !width )	width	=	730;
	if( !height )	height	=	460;
	
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   	href=mylink.href;
		window.open(href, windowname,'toolbar=no,directories=no,titlebar=yes,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width='+width+',height='+height+'');
	return false;
}