title: Master Pages and changing ID of form tag
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/4336867/asp-net-form-the-form-name-id-changes-to-aspnetform">ASP.NET Form - The form name\id changes to aspnetForm</a>  </p>
  </blockquote>
  
  
  
  <p>I'm using Framework V4.0, I used a master page, and a content page.</p>
  
  <p>I put my FORM tag in master page, and I set id of FORM tag to something like "form1" but when I view source of rendered page, I saw that <code>ASP.NET changed id of FORM tag to "aspnetForm"</code>.</p>
  
  <p>I mean I have this tag in master page file :</p>
  
  <pre><code>&lt;form id="form1" runat="server"&gt;
  </code></pre>
  
  <p><strong>but after page is rendered, ASP.NET Changed it to :</strong></p>
  
  <pre><code>&lt;form method="post" action="Default.aspx" id="aspnetForm"&gt;
  </code></pre>
  
  <p>as you see id attribute of Form tag is changed. What is reason of behind this?</p>