can't do postback on .NET page
<p>I am trying to add some functionality to a page I have inherited, but I am unable to do a postback on the page.  This is how the button appears when I view source :</p>

<pre><code>&lt;input type="submit" name="ctl00$ContentBody$btnUpload" value="Upload" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&amp;quot;ctl00$ContentBody$btnUpload&amp;quot;, &amp;quot;&amp;quot;, true, &amp;quot;&amp;quot;, &amp;quot;&amp;quot;, false, false))" id="ctl00_ContentBody_btnUpload" /&gt;
</code></pre>

<p>And this is how it looks in design mode :</p>

<pre><code>&lt;asp:Button ID="btnUpload" runat="server" OnClick="UploadFile_Click" Text="Upload" /&gt;
</code></pre>

<p>Can anybody please help with this, I am tearing my hair out trying to figure out why I can't postback!</p>
