function changeServiceToDown() {
	document.getElementById("service_buton").src = "img/service_down.gif";
}

function changeAboutUsToDown() {
	document.getElementById("aboutus_button").src = "img/aboutus_down.gif";
}

function changeDirectionsToDown() {
	document.getElementById("directions_button").src = "img/directions_down.gif";
}

function changeServiceToUp() {
	document.getElementById("service_buton").src = "img/service_up.gif";
}

function changeAboutUsToUp() {
	document.getElementById("aboutus_button").src = "img/aboutus_up.gif";
}

function changeDirectionsToUp() {
	document.getElementById("directions_button").src = "img/directions_up.gif";
}

function changeContactUsToUp() {
	document.getElementById("contactus_button").src = "img/contactus_up.gif";
}

function changeContactUsToDown() {
	document.getElementById("contactus_button").src = "img/contactus_down.gif";
}