please, please, please; help me : (

hi
please i want to customize my header just like this one:
https://img20.imageshack.us/img20/6967/28121.jpg
ther is the categries,when we chose an other category the background changes to,
and please how to use this css:

<style type="text/css">

/*Credits: ****** */
/*URL: https://www.*****.com/style/ */

.ubercolortabs{
padding: 0;
width: 100%;
overflow: hidden;
background: transparent;
}

.ubercolortabs ul{
font: bold 11px Arial, Verdana, sans-serif;
margin: 0;
padding: 0;
list-style: none;
}

.ubercolortabs li{
display: inline;
margin: 0 2px 0 0;
padding: 0;
text-transform: uppercase;
}

.ubercolortabs a{
float: left;
color: white;
background: #804000 url(xxx/xxxx.gif) no-repeat left top; /*default background color of tabs, left corner image*/
margin: 0 2px 0 0;
padding: 0 0 1px 3px;
text-decoration: none;
letter-spacing: 1px;
}

.ubercolortabs a span{
float: left;
display: block;
background: transparent url(xxxx/xxxxxx.gif) no-repeat right top; /*right corner image*/
padding: 7px 9px 3px 6px;
cursor: pointer;
}

.ubercolortabs a span{
float: none;
}

.ubercolortabs a:hover, .ubercolortabs li.selected a{
background-color: #AE5300; /*background color of tabs onMouseover*/
color: white;
}

.ubercolortabs a:hover span{
background-color: transparent;
}

.ubercolordivider{ /*CSS for horizontal line.*/
clear: both;
padding: 0;
width: 100%;
height: 5px;
line-height: 5px;
background: #804000; /*background color of horizontal line*/
border-top: 1px solid #fff; /*Remove this to remove border between bar and tabs*/
}
</style>

thank you