修改问题文档

@@ -242,6 +242,7 @@
 <script>
     var interval;
     var target_url = "{$target_url}";
+    target_url = target_url == '' ? "{:url('index/index/index')}" : target_url;
     console.log(target_url);
     //验证码登录校验手机号
     function testPhoneNum() {