title: Disable first character in textbox
body: <p>I have a textbox and it contain a value "Given Name". I want to disable first character of a textbox so that user cannot change the First Charcter in textbox by using backspace or any other means.
  For Example: suppose textbox contains the value "Given Name". I want that user cannot change the First character "G" by using backspace or any other means.</p>
  
  <pre><code>&lt;input type="text" id="nameId" onkeydown="validate(this.val)"/&gt;
  </code></pre>
  
  <p>Below is javascript function:</p>
  
  <pre><code>function validate2(val) {
    // have no idea how to do.
  
  }
  </code></pre>
  
  <p>I have no idea how to do it in Javscript or Jquery.</p>