update pay center for binding the pay interface. code review by LiangZhifeng

@@ -3,6 +3,8 @@
  * @author: 赵彪<bill.zhao@yoho.cn>
  * @date: 2015/12/03
  */
+var $ = require('jquery');
+
 var loading = require('../plugin/loading'),
     Hammer = require('yoho.hammer');
 
@@ -23,62 +25,63 @@ if (window.wx) {
     wx.hideOptionMenu();
 }
 
-function onBridgeReady(){
-    document.addEventListener('WeixinJSBridgeReady', function onBridgeReady()  {
-        WeixinJSBridge.call('hideOptionMenu');
+function onBridgeReady() {
+    document.addEventListener('WeixinJSBridgeReady', function() {
+        window.WeixinJSBridge && window.WeixinJSBridge.call('hideOptionMenu');
     });
 }
 
-if (typeof WeixinJSBridge == "undefined"){
-    if ( document.addEventListener ) {
-        document.addEventListener ('WeixinJSBridgeReady', onBridgeReady, false);
+if (typeof WeixinJSBridge === undefined) {
+    if (document.addEventListener) {
+        document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
     } else if (document.attachEvent) {
         document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
         document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
     }
     onBridgeReady();
-}else{
+} else {
     onBridgeReady();
 }
 
 //调用微信JS api 支付
-function jsApiCall(orderCode,jsApiParameters)
-{
+function jsApiCall(orderCode, jsApiParameters) {
+
     //防止重复操作弹框
-     WeixinJSBridge.invoke(
-          'getBrandWCPayRequest',
-          jsApiParameters,
-          function(res){
-              window.location.href = "/home/orders/detail?order_code="+orderCode;
-          }
-     );
+    window.WeixinJSBridge && window.WeixinJSBridge.invoke(
+       'getBrandWCPayRequest',
+       jsApiParameters,
+       function(res) {
+           window.location.href = '/home/orders/detail?order_code=' + orderCode;
+       }
+    );
 }
+
 //微信支付
-function callpay(orderCode)
-{
+function callpay(orderCode) {
     var jsApiParameters;
-    if (typeof WeixinJSBridge == "undefined"){
-        if( document.addEventListener ){
+
+    if (typeof WeixinJSBridge === undefined) {
+        if (document.addEventListener) {
             document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
-        }else if (document.attachEvent){
+        } else if (document.attachEvent) {
             document.attachEvent('WeixinJSBridgeReady', jsApiCall);
             document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
         }
-    }else{
+    } else {
         $.ajax({
-            type:"GET",
-            url:"/shopping/pay/wechatwapapi?order_code="+orderCode,
-            dataType:"json",
-            success:function(res){
-                if(res.code == 200){
-                    jsApiParameters = res.data.jsApiParameters;
-                    jsApiCall(orderCode,jsApiParameters);
-                }else{
-                    alert('微信支付调取失败');
+                type: 'GET',
+                url: '/shopping/pay/wechatwapapi?order_code=' + orderCode,
+                dataType: 'json',
+                success: function(res) {
+                    if (res.code === 200) {
+                        jsApiParameters = res.data.jsApiParameters;
+                        jsApiCall(orderCode, jsApiParameters);
+                    } else {
+                        alert('微信支付调取失败');
                     }
                 },
-            error:function(){
-                alert('请刷新本页面，完成微信支付');
+                error: function() {
+                    alert('请刷新本页面，完成微信支付');
                 }
             });
     }