title: Internet Explorer showing e.which as undefined
body: <p>In <code>Internet Explorer 8</code>, <code>event.which</code> is showing <code>undefined</code> and working fine in FireFox and <code>IE 9</code>. I am using the <code>Textbox</code> 'onkeypress' Event </p>
  
  <h2>MarkUp</h2>
  
  <pre><code>&lt;asp:TextBox runat="server" ID="tb1" MaxLength="3"
                          onkeypress="return MainCheckStrings(event);" /&gt;
  </code></pre>
  
  <h2>It is working fine in FF, Chrome, Safari and Internet Explorer - 9</h2>
  
  <p>Any Idea?</p>