need onclick to disable mouseover effects on an element

My page:

Note if you click the buttons, they change to another image. However, it doesn't "stick"... I need some way to disable the mouseover effect once a button is clicked. And then re-instate the mouseover effects. Is there some easy way to do this? My Javascript is not that good. Thank you!
<script language="javascript" type="text/javascript">
	if (document.images) {

	var buttonaoff = new Image()
	buttonaoff.src = "art/bt_1.jpg"
	var buttonaon = new Image()
	buttonaon.src = "art/bt_1b.jpg"
	var buttonahl = new Image()
	buttonahl.src = "art/bt_1c.jpg"

	var buttonboff = new Image()
	buttonboff.src = "art/bt_2.jpg"
	var buttonbon = new Image()
	buttonbon.src = "art/bt_2b.jpg"
	var buttonbhl = new Image()
	buttonbhl.src = "art/bt_2c.jpg"

	var buttoncoff = new Image()
	buttoncoff.src = "art/bt_3.jpg"
	var buttoncon = new Image()
	buttoncon.src = "art/bt_3b.jpg"
	var buttonchl = new Image()
	buttonchl.src = "art/bt_3c.jpg"

	var buttondoff = new Image()
	buttondoff.src = "art/bt_4.jpg"
	var buttondon = new Image()
	buttondon.src = "art/bt_4b.jpg"
	var buttondhl = new Image()
	buttondhl.src = "art/bt_4c.jpg"

	var buttoneoff = new Image()
	buttoneoff.src = "art/bt_5.jpg"
	var buttoneon = new Image()
	buttoneon.src = "art/bt_5b.jpg"
	var buttonehl = new Image()
	buttonehl.src = "art/bt_5c.jpg"

	var buttonfoff = new Image()
	buttonfoff.src = "art/bt_6.jpg"
	var buttonfon = new Image()
	buttonfon.src = "art/bt_6b.jpg"
	var buttonfhl = new Image()
	buttonfhl.src = "art/bt_6c.jpg"

	var buttongoff = new Image()
	buttongoff.src = "art/bt_7.jpg"
	var buttongon = new Image()
	buttongon.src = "art/bt_7b.jpg"
	var buttonghl = new Image()
	buttonghl.src = "art/bt_7c.jpg"

	var buttonhoff = new Image()
	buttonhoff.src = "art/bt_8.jpg"
	var buttonhon = new Image()
	buttonhon.src = "art/bt_8b.jpg"
	var buttonhhl = new Image()
	buttonhhl.src = "art/bt_8c.jpg"

	function act(imgName) {
	if (document.images)
	document[imgName].src = eval(imgName + 'on.src')

	function inact(imgName) {
	if (document.images)
	document[imgName].src = eval(imgName + 'off.src')
<script language="javascript" type="text/javascript">
function toggle(obj,bt) {
	document.getElementById('obituary').style.display = "none";
	document.getElementById('memories').style.display = "none";
	document.getElementById('submitamemory').style.display = "none";
	document.getElementById('lifehistory').style.display = "none";
	document.getElementById('militaryservice').style.display = "none";
	document.getElementById('video').style.display = "none";
	document.getElementById('pictures').style.display = "none";
	document.getElementById('serviceinformation').style.display = "none";
	document.getElementById(obj).style.display = "block";
	document[bt].src = eval(bt + 'hl.src')

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Brad BansnerWeb DeveloperAsked:
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the idea is to store the current active button
var activeButton = null;

in inact function
   if(button == activeButton) {
     do nothing

in toogle function
    // reset the previous
    var oldActiveButton = activeButton
    activeButton = newButton
    // reset

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Brad BansnerWeb DeveloperAuthor Commented:
Great, thanks!
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