function switchTo(target) {
	document.getElementById("DivClock").style.display = "none";
	document.getElementById("DivTrack").style.display = "none";
	document.getElementById("DivTeam").style.display = "none";
	document.getElementById("DivMech").style.display = "none";

	document.getElementById("DivClockLink").style.backgroundColor = "#333333";
	document.getElementById("DivTrackLink").style.backgroundColor = "#333333";
	document.getElementById("DivTeamLink").style.backgroundColor = "#333333";
	document.getElementById("DivMechLink").style.backgroundColor = "#333333";
	
	// reveal target
	document.getElementById(target).style.display = "block";
	
	switch(target) {
		case "DivClock":
		document.getElementById("DivClockLink").style.backgroundColor = "#4F0F0F";
		break;
		case "DivTrack":
		document.getElementById("DivTrackLink").style.backgroundColor = "#4F0F0F";
		break;
		case "DivTeam":
		document.getElementById("DivTeamLink").style.backgroundColor = "#4F0F0F";
		break;
		case "DivMech":
		document.getElementById("DivMechLink").style.backgroundColor = "#4F0F0F";		
		break;			
	}
}