if (document.images) {
	var menuOff= new Array(5);	
		for (var i = 1; i <= 4; i++) {
			menuOff[i] = new Image;
			menuOff[i].src = "img/menu" + i + ".gif";
		}
	var menuOn= new Array(5);	
		for (var i = 1; i <= 4; i++) {
			menuOn[i] = new Image;
			menuOn[i].src = "img/menu" + i + "_on.gif";
		}
	var preloadimg = new Array();
	preloadimg[0] = "img/home_s1_copy.gif"; 
	preloadimg[1] = "img/home_s2_copy.gif"; 
}

/*
function chimg(){
	n = Math.floor(Math.random() * 2)+1; 
	document.images['image1'].src = "img/home_s" + n + "_copy.gif";
}
*/
function chmenu(change,m){
	if(change=="on"){
		document.images["menu"+m].src = "img/menu" + m + "_on.gif";
	}else if(change=="off"){
		document.images["menu"+m].src = "img/menu" + m + ".gif";
	}
}