Ajax Search Form Issue

I tired ajax search form followed railscast 240 but when i applied the same code from railscast tutorial(ajax code), i have an issue the search functionality not working, i’m not good in ajax, can any one suggest what wrong functionality i did.
Here i attached some screen short for understanding purpose.
Here the ajax code:
**jQuery("#projects_search input").keyup(function() {
jQuery.get(jQuery("#projects_search").attr(“action”), jQuery("#projects_search").serialize(), null, “script”);
return false;