function myMouseOn(event) {
document.home.src='http://touchofgray.editme.com/files/Menu/home_hover.1.gif';
this.style.backgroundColor='yellow';
}

function myMouseOff(event) {
document.home.src='http://touchofgray.editme.com/files/Menu/home_current.1.gif';
}
document.getElementById('mytag').onmouseover = myMouseOn;
document.getElementById('mytag').onmouseout = myMouseOff;