/* popup */
function popup(url)
	{
        var width = 400;
        var height = 500;
        var top = (screen.availHeight - height)/2;
        var left = (screen.availWidth - width)/2;
        window.open(url, new Date().getTime(),'alwaysRaised=yes,toolbar=no,location=no,directories=no,status=yes,menubar=no,resizable=yes,screenX=0,screenY=0,titlebar=yes,scrollbars=yes,width='+ width + ',height=' + height + ',left=' + left + ',top=' + top);
	}