function aboutOn() {
	document["aboutLink"].src = "/images/about/about_gray.jpg"
}
function aboutOff() {
	document["aboutLink"].src = "/images/about/about_white.jpg"
}

function portOn() {
	document["portLink"].src = "/images/portfolio/portfolio_gray.jpg"
}
function portOff() {
	document["portLink"].src = "/images/portfolio/portfolio_white.jpg"
}

function contactOn() {
	document["contactLink"].src = "/images/contact/contact_gray.jpg"
}
function contactOff() {
	document["contactLink"].src = "/images/about/contact_white.jpg"
}