a:link {
color:#000099;
background:transparent;
}

a:visited {
color:#000099;
background:transparent;
}

a:active {
color:#000099;
background:transparent;
}

body { margin-top: 0; padding-top: 0; }

a:link:hover, a:visited:hover{
color:yellow;
text-decoration: none;
background:green;
}