title: How to change textbox value using javascript
body: <p>I am trying to change a textbox value.
  am trying following javascript but in both the alerts am getting image only. ie. 
  <code>$('#FileName').val = "testimage.jpg";</code> is not changing the text box field value.</p>
  
  <pre><code>&lt;x:input type="textbox" id="FileName"
  width="210px" value=""/&gt;
  
  if ($("#FileName").val() == "image") {
      alert($("#FileName").val())
      $('#FileName').val = "testimage.jpg";
      alert($("#FileName").val())
   } 
  </code></pre>