Here is my Javascript which is working initialyy and not working after a postback.
 <script type="text/javascript">
$(document).ready(function(){
    $('input[type="checkbox"]').click(function(){
        if($(this).attr("value")=="cash"){
            $(".cash").toggle();
        }
        if($(this).attr("value")=="cheque"){
            $(".cheque").toggle();
        }
        if($(this).attr("value")=="dd"){
            $(".dd").toggle();
        }
    });
});
</script>

 
    