title: Client id method javascript
body: <pre><code> &lt;input type="text" id="txtFirstName" runat="server" class="textReg"                                         
   onblur="javascript:validate_input(&lt;%=txtFirstName%&gt;,'imgFirstNameS','imgFirstNameE');" /&gt;`
  </code></pre>
  
  <p>I want to send control id to my javascript function  </p>
  
  <p>like <code>ctl00_ContentPlaceHolder1_txtFirstName</code></p>
  
  <p>or </p>
  
  <pre><code>function validate_input(control, success, error) {
  control = document.getElementById('&lt;%='+control+'.ClientID %&gt;');
  } 
  </code></pre>
  
  <p>is it possible ?</p>