<script type="text/javascript">

function limouseOver()
{
document.getElementById("b1").src ="/images/linkedin-on.gif"
}
function limouseOut()
{
document.getElementById("b1").src ="/images/linkedin-off.gif"
}

function fbmouseOver()
{
document.getElementById("b2").src ="/images/facebook-on.gif"
}
function fbmouseOut()
{
document.getElementById("b2").src ="/images/facebook-off.gif"
}

</script>
