MxWeiXinPF.Web/scripts/weixin/wxcomm.js

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function onBridgeReady() {
    WeixinJSBridge.call('hideOptionMenu');
    WeixinJSBridge.call('hideToolbar');
}

if (typeof WeixinJSBridge == "undefined") {
    if (document.addEventListener) {

        document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
        document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);

    } else if (document.attachEvent) {
        document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
        document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);

        document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
        document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);

    }
} else {
    onBridgeReady();
}