scrolling stop code

[sorry don't know what its called.]
Like when you have something scrolling with the marquee code, how do you make it so that when you scroll over it it stops?

Here it is :

Code:

<marquee onmouseover="this.stop();" onmouseout="this.start();">
Text To Scroll Should Be Placed Here
</marquee>

The marquee will stop once the mouse hovers over the text, and will start to scroll again once the mouse stops hovering over it,