title: jQuery: textbox keyup firing twice
body: <p>I'm having a textbox and assigned the following function (it's the only function assigned):</p>
  
  <pre><code>txt.bind("keyup",function(event){
      if(event.keyCode==13)
      {
          var nu = $("#debug").html();
          nu+="&lt;br&gt;enter";
          $("#debug").html(nu);
      }
  });
  </code></pre>
  
  <p>The strange thing is that it's actually firing twice, thus displaying "enter" twice in my debug window.
  Does anyone know what is causing this?</p>