function rollOn(navItem) {
	
	var keyImage = document.getElementById("keyImage");
	
	if (navItem == "i1") {
		keyImage.innerHTML = '<img src="images/lg-home.jpg">';
	} 
	else if (navItem == "i2") {
		keyImage.innerHTML = '<img src="images/lg-about.jpg">';
	} 
	else if (navItem == "i3") {
		keyImage.innerHTML = '<img src="images/lg-socio.jpg">';
	} 
	else if (navItem == "i4") {
		keyImage.innerHTML = '<img src="images/lg-sociotrain.jpg">';
	} 
	else if (navItem == "i5") {
		keyImage.innerHTML = '<img src="images/lg-frostbyte.jpg">';
	} 
	else if (navItem == "i6") {
		keyImage.innerHTML = '<img src="images/lg-aurora.jpg">';
	} 
	else if (navItem == "i7") {
		keyImage.innerHTML = '<img src="images/lg-contact.jpg">';
	} 
	
}

function rollOff(origSpace) {
		
	var keyImage = document.getElementById("keyImage");
	
	if (origSpace == "i1") {
		keyImage.innerHTML = '<img src="images/lg-home.jpg">';
	} 
	else if (origSpace == "i2") {
		keyImage.innerHTML = '<img src="images/lg-about.jpg">';
	} 
	else if (origSpace == "i3") {
		keyImage.innerHTML = '<img src="images/lg-socio.jpg">';
	} 
	else if (origSpace == "i4") {
		keyImage.innerHTML = '<img src="images/lg-sociotrain.jpg">';
	} 
	else if (origSpace == "i5") {
		keyImage.innerHTML = '<img src="images/lg-frostbyte.jpg">';
	} 
	else if (origSpace == "i6") {
		keyImage.innerHTML = '<img src="images/lg-aurora.jpg">';
	} 
	else if (origSpace == "i7") {
		keyImage.innerHTML = '<img src="images/lg-contact.jpg">';
	} 
	
}