how can i use the onkeyup event in textbox?
<p>hey guys,i want your help!this is my code:</p>

<pre><code>&lt;%
string a=Request.Params["a"]; 
%&gt;
&lt;form id="form1" runat="server"&gt;
    &lt;div&gt;
    &amp;nbsp;
  &lt;input type="text" id="cc" runat="server" visible="false"/&gt;
  &lt;input type="text" id="aa" runat="server" onkeyup="key(document.all.aa.value,'&lt;%=a; %&gt;');"/&gt;
</code></pre>

<p>the 'a' is a parameter request from another page.now in this page i hava a textbox and i give its a onkeyup event. then 'key()' is a function include two parameter:one is itself's value and another is 'a',but there is an error:Server tags can not contain &lt;% ...%> Structure.
what can i do?
i don't know if you understand me,because my English is very poor!</p>
