span.highlight
{
background-color:blue
}


.rollover
{
 display: block;
 background-position: left;
}

.rollover:hover{
 background-position: right;
}

h1
{
font-family:  arial, 'sans serif';
font-size: 150%;
}

*
{
font-family: sans-serif;
}
</style>