clientid is not found in javascript
<p>am getting error like this:</p>

<p><code>'System.Web.UI.WebControls.TextBox'</code> does not contain a definition for <code>'ClentID'</code> and no extension method <code>'ClentID'</code> accepting a first argument of type <code>'System.Web.UI.WebControls.TextBox'</code> could be found (are you missing a using directive or an assembly reference?)   </p>

<p>this is my code</p>

<pre><code> if (document.getElementById("&lt;%=txt_stuname.ClientID %&gt;").value == "") {
        alert("Student Name cannot be blank");
        document.getElementById("&lt;%=txt_stuname.ClentID %&gt;").focus();
        return false;
    }
</code></pre>
