Sharepoint selector for checkboxes

gistfile1.js

<script type="text/javascript">
  	/* $(document).ready(function() {  
			
			var thelist = new Array();
			$('input.s4-itm-cbx').change(function() {
			     if(this.checked) {
			         checker = $(this).parent().parent().attr("iid").split(',');
			         thelist.push(checker[1]);
			         alert(thelist);
			     }
			 });			
              
		}); */
</script>