How to add mouse over image effect?

[znowflake]

My frontpage is basically 1 big image, and i would like to add a mouse over/click effect to it, and on a normal website that would be easy, but i dont know where to start with zen cart.

Where do you add the code for the script, when the image involved is on the main page and only has to effect that?

[dgent]

My frontpage is basically 1 big image, and i would like to add a mouse over/click effect to it, and on a normal website that would be easy, but i dont know where to start with zen cart.

Where do you add the code for the script, when the image involved is on the main page and only has to effect that?

Just paste the code/html straight into the define page.