Utilizzando i CSS, infatti aprendo il file .css associato alla pagina web da te linkata puoi notare:

codice:
A:link {
FONT-SIZE: 9px; COLOR: #838383; FONT-STYLE: normal; 
FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif; 
TEXT-DECORATION: none
}
A:visited {
FONT-SIZE: 9px; COLOR: #838383; 
FONT-FAMILY: Verdana, Arial,Helvetica, sans-serif; 
TEXT-DECORATION: none
}
A:hover {
FONT-SIZE: 9px; LEFT: 1px;  
COLOR: #000000; FONT-STYLE: normal; 
FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif;
POSITION: relative;  TOP: 1px 
}
A:active {
FONT-SIZE: 9px; LEFT: 1px;  
COLOR: #000000; FONT-STYLE: normal; 
FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif; 
POSITION: relative;  TOP: 1px;  
TEXT-DECORATION: none
}