if (document.images) {
	var imgPath = "images/"

	var env1 = new Image; env1.src = imgPath + "env-on.gif";
	var env0 = new Image; env0.src = imgPath + "env.gif";

	var events1 = new Image; events1.src = imgPath + "events-on.gif";
	var events0 = new Image; events0.src = imgPath + "events.gif";

	var exhibits1 = new Image; exhibits1.src = imgPath + "exhibits-on.gif";
	var exhibits0 = new Image; exhibits0.src = imgPath + "exhibits.gif";
	
	var exp1 = new Image; exp1.src = imgPath + "exp-on.gif";
	var exp0 = new Image; exp0.src = imgPath + "exp.gif";

	var twist1 = new Image; twist1.src = imgPath + "twist-on.gif";

	var twist0 = new Image; twist0.src = imgPath + "twist.gif";

}



//**************************************************************//

function doRollover(imgName, onOff) {
	if (document.images) {
	var targetObj = eval(imgName+onOff);
		if (document.images[imgName] != null && targetObj != null) {
		document.images[imgName].src = targetObj.src;
		}
	}
}