a#button1 {
    display: block;
    width: 101px;
    height: 23px;
    background-image: url('images/nav/1g.jpg');
    margin: 0 auto
}
a#button1:hover {
    background-image: url('images/nav/1b.jpg');
}
a .alt { display: none; }



a#button2 {
    display: block;
    width: 145px;
    height: 23px;
    background-image: url('images/nav/2g.jpg');
    margin: 0 auto
}
a#button2:hover {
    background-image: url('images/nav/2b.jpg');
}
a .alt { display: none; }

a#button3 {
    display: block;
    width: 165px;
    height: 23px;
    background-image: url('images/nav/3g.jpg');
    margin: 0 auto
}
a#button3:hover {
    background-image: url('images/nav/3b.jpg');
}
a .alt { display: none; }



a#button4 {
    display: block;
    width: 142px;
    height: 23px;
    background-image: url('images/nav/4g.jpg');
    margin: 0 auto
}
a#button4:hover {
    background-image: url('images/nav/4b.jpg');
}
a .alt { display: none; }



a#button5 {
    display: block;
    width: 147px;
    height: 23px;
    background-image: url('images/nav/5g.jpg');
    margin: 0 auto
}
a#button5:hover {
    background-image: url('images/nav/5b.jpg');
}
a .alt { display: none; }







CSS
#navcontainer ul
{
padding-left: 0;
margin-left: 0;
background-color: #036;
color: White;
float: left;
width: 100%;
font-family: arial, helvetica, sans-serif;
}

#navcontainer ul li { display: inline; }

#navcontainer ul li a
{
padding: 0.4em 1em;
background-color: #036;
color: White;
text-decoration: none;
float: left;
border-right: 0px solid #fff;
}

#navcontainer ul li a:hover
{
background-color: #369;
color: #fff;
}