ul, li { /* using a list for menu */
list-style-type: none; /* cleaning up the list */
margin:0;
padding:0;
}

ul {
position: relative; /* positionning for IE5 et IE5.5 */
left: 0px;
top: 0px;
background: transparent url(menuimage.gif) top left no-repeat; /* general background for the menu */
height: 265px;
width: 145px;
text-align: center;
}

li {
display: inline; /* correction for IE5 et IE5.5 */
}

li a { /* buttons dimensions and definition */
display: block; /* block for <a> to give it its dimensions */
height: 44px;
width: 145px;
line-height: 44px; /* height of line to avoid paddings */
color: #0b1560;
font-size: 14px;
font-weight: bold;
font-family: arial, helvetica, sans-serif;
text-decoration: none;
text-align: center
}

li a:hover {
color: #0b1560;
background: transparent url(menuimage.gif) top left no-repeat;
}

a#menu1:hover {
background-position: 0% -265px; /* move of background for each button */
}

a#menu2:hover {
background-position: 0% -309px;
}

a#menu3:hover {
background-position: 0% -353px;
}

a#menu4:hover {
background-position: 0% -397px;
}

a#menu5:hover {
background-position: 0% -441px;
}

a#menu6:hover {
background-position: 0% -485px;
}