.hbuttons a{
display: block;
align: center;
text-decoration: none;
font: bold 13px Tahoma;
color: black;
margin-left: 20px;
width: 78px;
height: 23px;
float: left;
display: inline;
margin-right: 8px;
background-image:url(../images/tabsquare.jpg);
background-repeat: no-repeat;
padding-top: 4px;
text-align:center;
}

.hbuttons a:hover{
background-image:url(../images/tabsquareover.jpg);
}