Create Me A Javascript

I need a Javascript to be created for my website to enhance the look, feel and usability. I'm not exactly sure if there are specific scripting conventions that must be followed, so I'd like some guidance on that. The Javascript will need to work in the Chrome browser. The type of Javascript that I need would be for ETB 3.0.2. I have shared a file i need script like that. This project dont need much work so make your bids about 600 Rs so that I can hire you.