Get ClientID in Javascript
<p>I have a javascript file that Select a button using jQuery and check it for validation.the code is:</p>

<pre><code>$(document).ready(function () {
$('#&lt;%= btn_Insert.ClientID %&gt;').on("click", function (event) {

    if (Validate() != true) {
        event.preventDefault();
    }
});
function Validate() {
    return (1 == 1);
});
</code></pre>

<p>but I can' get <code>ClientID</code> for button and I get this Error:</p>

<blockquote>
  <p>Object doesn't support this property or method</p>
</blockquote>

<p>where is my mistake?How I can get Client ID for a server side Button?</p>

<p>thanks</p>

<p><strong>EDIT 1)</strong></p>

<p>When I add script in <code>head</code> part of page it works but when I write it to a JS file and add reference to it in <code>head</code> part it does not work</p>
