Some arbritrary jquery.

sample.js

$(document).ready(function(){

$('.btn-delete-workflow-comment').click(function(e){
	e.preventDefault();
	var url =  $(this).parent().attr('href') + '/do';
	$(this).parent().parent().parent().fadeOut('slow');
 	ajax_request(url);
});

$('.btn-delete-image').click(function(e){
	e.preventDefault();
	var url =  $(this).parent().attr('href') + '/do';
	$(this).parent().parent().parent().fadeOut('slow');
	ajax_request(url);
});

function ajax_request(url)
{
    var str = 'data';
    $.ajax({
            type: "POST",
            url: url,
            data: str,
            success: function(msg){
				if(msg == 'OK')
				{
					$('#ajax-message').text('Your action was successful.');
					$('#ajax-message').attr('class','success message');
					$('#ajax-message').fadeIn('slow');
					setTimeout(function(){ $('#ajax-message').fadeOut('slow') }, 3000);
	            }
				else
				{
					$('#ajax-message').text('There was an error.');
					$('#ajax-message').attr('class','error message');
					$('#ajax-message').fadeIn('slow');
					setTimeout(function(){ $('#ajax-message').fadeOut('slow') }, 3000);
				}
			}
         });
}
        
});