页面只能在微信中打开，并禁用分享功能

        /* begin禁用微信分享功能 */
        function onBridgeReady() {
            WeixinJSBridge.call('hideOptionMenu');
        }
        if (typeof WeixinJSBridge == "undefined") {
            if (document.addEventListener) {
                document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
            } else if (document.attachEvent) {
                document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
                document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
            }
        } else {
            onBridgeReady();
        }
        /* end禁用微信分享功能 */
        // 对浏览器的UserAgent进行正则匹配，不含有微信独有标识的则为其他浏览器  
        var useragent = navigator.userAgent;
        if (useragent.match(/MicroMessenger/i) != 'MicroMessenger') {
            // 这里警告框会阻塞当前页面继续加载  
            // 以下代码是用javascript强行关闭当前页面  
            var opened = window.open('about:blank', '_self');
            /*opened.opener = null;
            opened.close();*/
        }else{
            window.alert = function(name){
                var iframe = document.createElement("IFRAME");
                iframe.style.display="none";
                iframe.setAttribute("src", 'data:text/plain,');
                document.documentElement.appendChild(iframe);
                window.frames[0].window.alert(name);
                iframe.parentNode.removeChild(iframe);
            }
        }