<script src="https://cdn.kgcaptcha.com/captcha.js?appid=xxx"></script>
<script>
kg.captcha({
    // 绑定显示区域
    bind: "#captchaBox",
    // 向上或向下浮出，top|down
    float: "top",
    // 验证成功事务处理
    success: function (e) {
        console.log(e);
    },
    // 验证失败事务处理
    failure: function (e) {
        console.log(e);
    },
    // 点击刷新按钮时触发
    refresh: function (e) {
        console.log(e);
    }
});
</script>
<div id="captchaBox">载入中 ...</div>