Why can't I call a form content?
<p>I have this simple code:</p>

<pre><code>&lt;html&gt;
&lt;body&gt;

&lt;form name="f1"&gt;
&lt;asp:Label name="lbl"  runat="server" Text="Label" onclick="lblClick()"&gt;&lt;/asp:Label&gt;
&lt;/form&gt;

&lt;script type="text/javascript"&gt;

function lblClick(){
document.f1.lbl.text="new text";}
&lt;/script&gt;

&lt;/body&gt;
&lt;/html&gt;
</code></pre>

<p>It doesn't work, it gives me:
Microsoft JScript runtime error: 'document.getElementById(...)' is null or not an object ... , 
I can't even change the label text ....why?!!!</p>
