check uncheck All checkboxes with another single checkbox use jquery

Question

I use jquery-1.9.1.js In my html page, it works well for the first time.

just like http://jsfiddle.net/pzCcE/1/

Can somebody help me to improve it?

Answer 1

With answer of j08691 look into following thing also..

It totally makes no sense to create a selector like #id #id because an ID has to be unique within your DOM by definition.

$("#tab1 .checkAll").click(function () {