simplebutton_style.css

a{
border-radius:10px;
background:#efefef;
color:blue;
font-size: 12px;
padding:5px 16px 5px 16px;
margin: 10px;
line-height:90%;
}

a:Hover {
-moz-border-radius: 10px;
border-top:#000 solid 1px;
border-radius:10px;
background:#000;
color:white;
text-decoration:none;
font-size: 12px;
padding:5px 16px 5px 16px;
margin: 10px;
line-height:90%;

}