// preload function
function preload(path,image,filetype) {
	ext = filetype || ".gif";
	eval(image+"_0 = new Image()");	eval(image+"_0.src = '../images/"+path+"/"+path+"_"+image+ext+"'");
	eval(image+"_1 = new Image()");	eval(image+"_1.src = '../images/"+path+"/"+path+"_"+image+"_over"+ext+"'");
}
// rollover function
function rollover(thisImg,state) {
	if (document.images) 
		document.images[thisImg].src = eval(thisImg + "_" + state + ".src");
}