function openWindow()
    {
        var mymiss=confirm("是否打开新窗口？");
        if(mymiss==true)
        {
             var myul=prompt("确认打开的网址","http：//www.imooc.com");
        if(myul!=null)
        {
            window.open('http：//www.imooc.com','_blank','width=400,height=500,menubar=no,toolbar=no');
        }
        else
        {alert("再见！");}
        }
        else
        {alert("再见！");}
    }