[Roll Over Image] Quick Question !!! Urgent Plz!!

[adam1987]

Hello, everyone:

Wonder when set up a css rollover image, how to set the background-image correctly?
For example, if the image url is :
http://testsite.com/trail1/wp-content/uploads/2011/12/Tabs-trial-v_03.png
then, what should I write down in the CSS for my rollover's background:
background-image: url(yaprak_bw_color.png);

Urgent help needed plz!!!!!!!

 

[PixelPusher]

Basic example of using an image sprite for a rollover effect on a link.

a {
display:block;
line-height:1.5em;
font-size:1.1em;
padding:0 10px;
color:#d9d9d9;
text-decoration:none;
background:transparent url(backgroundSprite.png) 0 0 no-repeat;
}
a:hover, a:focus {
color:#fff
background-position: 0 -50px;
}