<script type="application/javascript">
    var captcha = sliderCaptcha({
        id: 'captcha',
        repeatIcon: 'fa fa-redo',
        setSrc: function () {
            // return 'http://imgs.blazor.zone/images/Pic' + Math.round(Math.random() * 136) + '.jpg';
            return 'images/Pic' + Math.round(Math.random() * 4) + '.jpg'; // 使用本地的img
        },
        onSuccess: function () { //成功事件
             console.log("成功");
           
        }
    });

    $("#btn1").click(function () {
        $("#choiceWindow").slideDown(300);
        $("#backGround").show();
    });
</script>