function popup() {
	width=450;
	height=690;
    x = (1024 - width)/2;
    y = (600 - height)/2;

    if (screen) {
        y = (screen.availHeight - height)/2+17;
        x = (screen.availWidth - width)/2-3;
    }
    f=window.open('http://host.mobilebackstage.net/window/html/webWindow/15','popup','scrollbars=yes,resizeable=0,toolbar=no,menubar=no,location=no,directories=no,copyhistory=no,status=no,width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x);
    f.focus();
}