more than 20 address

@@ -12,7 +12,8 @@ var $ = require('yoho-jquery'),
 var $receiver = $('#receiver');
 
 var Dialog = popup.Dialog,
-    Confirm = popup.Confirm;
+    Confirm = popup.Confirm,
+    Alert = popup.Alert;
 
 var addressDialogTpl;
 var addressTpl;
@@ -278,8 +279,12 @@ $('.address-all').click(function() {
 // 新增地址
 $('.new-address').click(function() {
 
-    // not $('.address-all).click(newAddress);
-    // because newAddress get a param, this type written will cause disaccord param of newAddress
+    // 判断是否超过20条地址
+    if ($('#address-list .address').length >= 20) {
+        new Alert('您最多添加20个收货地址，可删除不需要的地址后再添加新地址').show();
+        return;
+    }
+
     newAddress();
 });