title: Create a hidden field in JavaScript
body: <p>How do you create a hidden field in JavaScript into a particular form ? </p>
  
  <pre><code>    &lt;html&gt;
      &lt;head&gt;
        &lt;script type="text/javascript"&gt;
        var a =10;
  function test() {
        if (a ==10)  {
          //  ... Here i need to create some hidden field for form named = chells
        }
  }
        &lt;/script&gt;  
      &lt;/head&gt;   
      &lt;body &gt;
        &lt;form id="chells" name="formsdsd"&gt;
        &lt;INPUT TYPE=BUTTON OnClick="test();"&gt;
       &lt;/form&gt; 
      &lt;/body&gt;
      &lt;/html&gt; 
  </code></pre>