function popup(url, w, h) {
	var osname = navigator.userAgent.toUpperCase();
	
	if(osname.indexOf("WIN") >= 0){
		w = w + 16; h = h + 16;
	}
	
    window.open(url, '', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, width=' + w + ', height=' + h + ', left=50, top=50');
}