Running Vantage theme – Having css conflict problem with my script.

Hello there.

I’m trying out the Vantage theme, i like it a lot and plan to upgrade to Premium before i run my site live.

However, i have 1 problem with the script that i will be running on my website.

It’s a car rental script, i can get this working on static html site without any problem and a few other wordpress theme, but not on Vantage theme.

Please take a look at live exemple :

on html static page -> www.ud-carrent.com/booking/
on vantage theme -> http://udbike.com.gridhosted.co.uk/booking/

However, with the vantage i get some misalignment with the script design.
I believe the css is conflicting with the Vantage theme’s css?

I implemented my script by copy and paste to the actual page, since it’s only going to be used by 1 page.
Is this the correct way to add a script?

Thank you in advance.

URL: http://udbike.com.gridhosted.co.uk/booking/