var LinkAddress = "http://www.aceprocessors.co.uk/AcePro/images/";

function onover(DivId)
{
document.getElementById(DivId).style.backgroundImage='url("' + LinkAddress + 'Nav.gif")';
}

function offover(DivId)
{
document.getElementById(DivId).style.backgroundImage='none';
}

function bonover(DivId)
{
document.getElementById(DivId).style.backgroundImage='url("' + LinkAddress + 'buttonup.png")';
}

function boffover(DivId)
{
document.getElementById(DivId).style.backgroundImage='url("' + LinkAddress + 'buttonup.png")';
}

function bclick(DivId)
{
document.getElementById(DivId).style.backgroundImage='url("' + LinkAddress + 'buttonpressed.png")';
}