How to handle dynamic checkbox checkchange using JQuery

does it works I have tested the code in your website and it works let me know if it doesnot

if it is possible have a look at this link,click on "Book online"; there is one [4.Extras]; that datalist event i want to do using javascript.
Presently i've put the above mentioned code and so that while selecting check box the update progress panel loading image comes and i don't want to display in this case.
I've applied your code also but that message not comes while uploaded the code in the server. Please see this link.

Thanks for your reply; it works. But only once. First time when i click checkbox then i got a message; but next time it doesn't work.
Can you please share what to do if i want to show the message box every time the checkbox is checked?
Thanks in advance.