rebot check refer bug

@@ -115,6 +115,7 @@
     "yoho-jquery-pjax": "0.0.1",
     "yoho-jquery-placeholder": "^2.3.1",
     "yoho-jquery-qrcode": "^0.14.0",
+    "yoho-qs": "^1.0.1",
     "yoho-slider": "0.0.2",
     "yoho-swiper": "^3.3.1"
   }

 var $ = require('yoho-jquery'),
-    Captcha = require('../plugins/captcha');
+    Captcha = require('../plugins/captcha'),
+    qs = require('yoho-qs');
 
 // 一直是极验证码
 var captcha = new Captcha('.captcha-wrap', {
@@ -13,7 +14,7 @@ require('../common/promise');
 
 $('.confirm').on('click', function() {
     captcha.check().then(function() {
-        window.jumpUrl(window.queryString().refer || '//www.yohobuy.com');
+        window.jumpUrl(qs.refer ? decodeURIComponent(qs.refer) : '//www.yohobuy.com');
     });
 });