var c,btnName
var leftHolder=new Image()
var rightHolder=new Image()
function over(btn) {
	btnName=btn
	document.images[btn].src="assets/graphics/"+btn+"_over.gif"
	for (c=0;c<document.images.length;c++) {
		if (document.images[c]==document.images[btn]) {
			break
		}
	}
	leftHolder.src=document.images[c-1].src
	rightHolder.src=document.images[c+1].src
}
function out() {
	document.images[c].src="assets/graphics/"+btnName+".gif"
	document.images[c-1].src=leftHolder.src
	document.images[c+1].src=rightHolder.src
	
}
function down() {
	document.images[c].src="assets/graphics/"+btnName+"_dn.gif"
	if (btnName==rightBtn) {document.images[c-1].src="assets/graphics/btn_dn_dn.gif"}
		else {document.images[c-1].src="assets/graphics/btn_up_dn.gif"}
	if (btnName==leftBtn) {document.images[c+1].src="assets/graphics/btn_dn_dn.gif"}
		else {document.images[c+1].src="assets/graphics/btn_dn_up.gif"}
}