How to ensure if atleast one checkbox is selected for multiselect jqury plugin
<p>I am using the jquery multiselect <a href="http://www.erichynds.com/jquery/jquery-ui-multiselect-widget/" rel="nofollow">plugin</a>.  Right now I am checking if the user has selected any checkbox or not with the below code.</p>

<pre><code> function fntemp()
{

var values = $("select").val();
alert(values);
if(!values){
alert("Please select atleast one value from the dropdown.");    
 }
}
</code></pre>

<p>But this does not work when we click "Check All" link. Any suggestions?</p>
