function swapMenu1() {
{document.home.src="images/button_home_over.gif"}
}
function swapBack1() {
{document.home.src="images/button_home.gif"}
}

function swapMenu2() {
{document.about.src="images/button_about_over.gif"}
}
function swapBack2() {
{document.about.src="images/button_about.gif"}
}

function swapMenu3() {
{document.research.src="images/button_research_over.gif"}
}
function swapBack3() {
{document.research.src="images/button_research.gif"}
}

function swapMenu4() {
{document.biography.src="images/button_biography_over.gif"}
}
function swapBack4() {
{document.biography.src="images/button_biography.gif"}
}

function swapMenu5() {
{document.contact.src="images/button_contact_over.gif"}
}
function swapBack5() {
{document.contact.src="images/button_contact.gif"}
}