title: "Uncaught SyntaxError: Unexpected token" when parse jsonp
body: <p>I have created a json webservice in ASP.NET.</p>
  
  <pre><code>URL http://mydomain:21130/JSONdata.aspx?Option=GetListRootMenus
  </code></pre>
  
  <p>Data return:</p>
  
  <pre><code>{"NumberOfMenu":"2", "Menus":[{"MenuKey":"menu_home", "MenuLevel":"1" },{"MenuKey":"menu_info", "MenuLevel":"1" }]}
  </code></pre>
  
  <p>After that, i parsed via JSONP</p>
  
  <pre><code>&lt;!doctype html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
    &lt;meta charset="utf-8"&gt;
    &lt;title&gt;jQuery.getJSON demo&lt;/title&gt;
    &lt;script src="http://code.jquery.com/jquery-1.10.2.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;p&gt; this is a param &lt;/p&gt;
   &lt;script&gt;
        $(document).ready(function(){
        console.log("zc");
              $.ajax({
                    dataType: "jsonp",
                    type: 'GET',
                    url: "http://mydomain:21130/JSONdata.aspx?Option=GetListRootMenus&amp;callback=?",
                    success: function(data) {
                      console.log("123");
                    },
                    error: function(){
                      console.log("456");
                    }
              });
        });
  &lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>but wrong. i don't know why :(
  <img src="https://i.stack.imgur.com/lNuIh.png" alt="enter image description here"></p>