去掉微信公眾號里面的菜單欄

去掉微信公眾號里面的菜單欄：
<script type="text/javascript">
function onBridgeReady(){
WeixinJSBridge.call('hideOptionMenu');
}

if (typeof WeixinJSBridge == "undefined"){ //alert("undefined");
if( document.addEventListener ){
document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
}else if (document.attachEvent){
document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
}
}else{ //("其他");
onBridgeReady();
}
</script>