if (document.images) {

	//precache all 'off' button images
	var offImgArray = new Array();
	offImgArray["team"] = new Image(117,72);
	offImgArray["turnkey"] = new Image(117,72);
	offImgArray["modular"] = new Image(117,72);
	offImgArray["manufactured"] = new Image(117,72);
	offImgArray["choosing"] = new Image(117,72);
	
	//off image array - - set 'off' image path for each button
	offImgArray["team"].src = "images/baker_team.jpg";
	offImgArray["turnkey"].src = "images/couch.jpg";
	offImgArray["modular"].src = "images/modular.jpg";
	offImgArray["manufactured"].src = "images/manufactured.jpg";
	offImgArray["choosing"].src = "images/choosing_home.jpg";

	//precache all 'on' button images
	var onImgArray = new Array();
	onImgArray["team"] = new Image(117,72);
	onImgArray["turnkey"] = new Image(117,72);
	onImgArray["modular"] = new Image(117,72);
	onImgArray["manufactured"] = new Image(117,72);
	onImgArray["choosing"] = new Image(117,72);
	

	//on image array - - set 'on' image path for each button
	onImgArray["team"].src = "images/baker_teamOn.jpg";
	onImgArray["turnkey"].src = "images/couchOn.jpg";
	onImgArray["modular"].src = "images/modularOn.jpg";
	onImgArray["manufactured"].src = "images/manufacturedOn.jpg";
	onImgArray["choosing"].src = "images/choosing_homeOn.jpg";
	
}
// functions that swap harn images 
function imageOn(imgName) {
	if (document.images) {
	   document.images[imgName].src = onImgArray[imgName].src;
	}
}

function imageOff(imgName) {
	if (document.images) {
	   document.images[imgName].src = offImgArray[imgName].src;
	}
}