ASP.NET _doPostBack from Javascript
<p>The follow code does not work in IE:</p>

<pre><code>&lt;script type="text/javascript" src="js/jquery-1.4.2.min.js"&gt;&lt;/script&gt;
&lt;script type="text/javascript"&gt;
    $(function(){
            $(":text[id*=txtPopCEP]").keypress(function(e){
                  var tecla = (e.which) ? e.which : e.keycode;
                  if(tecla == 13)
                  {
                      __doPostBack('ctl00$ContentPlaceHolder1$ImageButton1', '');

                  }
            });
    });
&lt;/script&gt;
</code></pre>

<p>It doenst call the doPostBack function.But in FF it works...Any ideias?</p>

<p>ImageButton1 code output:</p>

<pre><code>    &lt;input type="image" name="ctl00$ContentPlaceHolder1$ImageButton1" id="ctl00_ContentPlaceHolder1_ImageButton1" src="imagens/btCEP.jpg" style="border-width:0px;" /&gt;
</code></pre>
