if (document.images) {
	bus1on = new Image();
	bus1on.src = "images/business_menu01on.gif";
	bus1off = new Image();
	bus1off.src = "images/business_menu01.gif";
	bus2on = new Image();
	bus2on.src = "images/business_menu02on.gif";
	bus2off = new Image();
	bus2off.src = "images/business_menu02.gif";
	bus3on = new Image();
	bus3on.src = "images/business_menu03on.gif";
	bus3off = new Image();
	bus3off.src = "images/business_menu03.gif";
	bus4on = new Image();
	bus4on.src = "images/business_menu04on.gif";
	bus4off = new Image();
	bus4off.src = "images/business_menu04.gif";
	bus5on = new Image();
	bus5on.src = "images/business_menu05on.gif";
	bus5off = new Image();
	bus5off.src = "images/business_menu05.gif";
	bus6on = new Image();
	bus6on.src = "images/business_menu06on.gif";
	bus6off = new Image();
	bus6off.src = "images/business_menu06.gif";
	bus7on = new Image();
	bus7on.src = "images/business_menu07on.gif";
	bus7off = new Image();
	bus7off.src = "images/business_menu07.gif";
	bus8on = new Image();
	bus8on.src = "images/business_menu08on.gif";
	bus8off = new Image();
	bus8off.src = "images/business_menu08.gif";
}
function imgOn(imgName) {
	if (document.images) {
		document[imgName].src=eval(imgName+"on.src");
	}
}
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src=eval(imgName+"off.src");
	}
}