Product listing shade every other row

Hi All.
I have look throught the contribs and forum but have not found anything.
I have a site and when you click on a catagory and all the products show up the back ground is white on all. I have seen Zen carts where the product listing has shaded background for every other item.

Product1 - white background
Product2 - Grey background
Product3 - white background
Product4 - Grey background

Any idea where or how to do this?
Thanks
Sean

Please put up a URL to your site so I can see the CSS.

If you do this, I will be able to help.

I have the following in one of my websites' stylesheet.

Try adding it to the bottom of your stylesheet.css .

td.productListing-data {
font-size:10px;
padding:5px;
}

tr.productListing-odd, tr.upcomingProducts-odd {
background:#E3E3E3 none repeat scroll 0 0;
}

tr.productListing-even, tr.upcomingProducts-even, .productsNotifications {
background:#EDEDED none repeat scroll 0 0;
}

Thanks fairestcape ! !

Works like a charm ! ! !