Jquery file format
<p>HI.</p>

<p>I have multiple webpages. So I have a common external js file. And I have added this js file to every page. I have multiple check boxes in every page. And I have written the click event in the external, common js file. But I wonder how the js file should be? 
Currently I have written like this.</p>

<pre><code>$(document).ready(function() {
    $(".chk").click(function() {
    alert("hi");
   });
});
</code></pre>

<p>But whenever I click a checkbox the click event is fired twice. it should be once. I dont know where is the error, is there any error in writing the js file?
please comment.</p>
