function onMouseOver(id)
{
document.getElementById(id).src = "assets/complete/buttons/" + id + "_Over.png";
}
function onMouseOut(id)
{
document.getElementById(id).src = "assets/complete/buttons/" + id + ".png";
}

function onMouseDown(id)
{
document.getElementById(id).src = "assets/complete/buttons/" + id + "_Down.png";
}

function onMouseUp(id)
{
document.getElementById(id).src = "assets/complete/buttons/" + id + "_Over.png";
}