在微信、支付宝、百度钱包实现点击返回按钮关闭当前页面和窗口

WeixinJSBridge.call('closeWindow');//微信  
 AlipayJSBridge.call('closeWebview');  //支付宝  
 BLightApp.closeWindow();//百度钱包

var ua = navigator.userAgent.toLowerCase();    
f(ua.match(/MicroMessenger/i)=="micromessenger") {    
      alert("微信客户端");  
} else if(ua.indexOf("alipay")!=-1){    
 alert("支付宝客户端");   
}else if(ua.indexOf("baidu")!=-1){    
 alert("百度客户端");   
}

$(function(){  
            pushHistory();  
            window.addEventListener("popstate", function(e) {  
                  
        }, false);  
            function pushHistory() {  
                var state = {  
                    title: "title",  
                    url: "#"  
                };  
                window.history.pushState(state, "title", "#");  
            }  
});

$(function(){  
            pushHistory();  
            window.addEventListener("popstate", function(e) {  
                pushHistory();  
                var ua = navigator.userAgent.toLowerCase();    
                if(ua.match(/MicroMessenger/i)=="micromessenger") {    
                     WeixinJSBridge.call('closeWindow');  
                } else if(ua.indexOf("alipay")!=-1){    
                     AlipayJSBridge.call('closeWebview');    
                }else if(ua.indexOf("baidu")!=-1){    
                    BLightApp.closeWindow();  
                }  
                else{  
                    window.close();  
                }  
        }, false);  
            function pushHistory() {  
                var state = {  
                    title: "title",  
                    url: "#"  
                };  
                window.history.pushState(state, "title", "#");  
            }  
        });