Create a simple menu to diplays Products and Sub Products using JavaScript

Please give more details how are you displaying the list. What controls you are using?

there are 4 products in left side Div

eg

product1    sub Product1a  sub Productb

product2

product3

product4

if i Click any product from the list it should display it should display its sub products to its right hand side

Refer

Simple Hover Menu using jQuery and JavaScript

your eg shows on h over i want on click of particular item

my webpage already contain jquery this thing i want on particular page not on all page

You can use it on one page. What's the problem