How to give class name dynamically to HTML Tag

[bapu_prabir]

Hi Friends..
I have a set of of div tags with different ID.
I want to give them a class name during page loading dynamically according to IDs.
How to do that,can u please help!! I am beginer in Javascript.

Thanx,
Prabir

[AutisticCuckoo]

document.getElementById("your-id").className = "your-class";

[bapu_prabir]

Thx AutisticCuckoo..
Its working beautifully.

[NokX]

setting attributes, like class names, is typically done like this...

document.getElementById("your-id").setAttribute("class", "your-class");

however since IE has to be different - the way AutisticCuckoo pointed out has to be used for IE to change classes properly.