a.tab 
{ 
    border-collapse: collapse; 
    border-style: solid solid none solid;  
    border-color: black; 
    border-width: 1px 1px 0px 1px; 
    background-color: silver; 
    padding: 2px 0.5em 0px 0.5em; 
    margin-top: 4px;
    margin-right: 2px;
    font-family: arial; 
    text-decoration: none;
    width: auto;
    text-align: center;
	font-weight:bold;
    float: left;
}
a.tab:hover 
{ 
    border-color: black; 
    background-color: white; 
}