网页微信禁止转发代码

<script type="text/javascript">
        document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {

            // 通过下面这个API隐藏右上角按钮

            WeixinJSBridge.call('hideOptionMenu');

        }); 

        document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {

            // 通过下面这个API隐藏底部导航栏

            WeixinJSBridge.call('hideToolbar');

        }); 

        //禁止微信以外浏览器打开
        var ua = navigator.userAgent.toLowerCase();
        var isWeixin = ua.indexOf('micromessenger') != -1;
        var isAndroid = ua.indexOf('android') != -1;
        var isIos = (ua.indexOf('iphone') != -1) || (ua.indexOf('ipad') != -1);

        if (!isWeixin) {

            document.head.innerHTML = '<title>抱歉，出错了</title><meta charset="utf-8"><meta name="viewport"><link rel="stylesheet" type="text/css" href="https://res.wx.qq.com/open/libs/weui/0.4.1/weui.css">';
            window.location.href = "../nopower.aspx";

        }