Quick modification - CakePhp & Ajax/Jquery

We need someone who really knows CakePhp and also Jquery/Ajax/JavaScript, to modify a script that we [login to view URL] must be really quick for someone who's got good knowledges (around 40 minutes I guess).Here's what we need :-> Refresh a string/number when someone click on a button, without refeshing the page so with Jquery-> Change an animation made in Javascript (pretty simple one)-> Print the number of people logged in the websiteIf we're happy with your work, we might consider to hire the coder for more projects.