function rollOn(img,loc) {
	tempSrc = img.src;
	img.src=loc;
}
function rollOff(img) {
	img.src = tempSrc;
}

function turnImage(dir) {
	curImg = curImg+dir;
	if(curImg<0) {
		curImg = imgCount-1;
	} else if(curImg>imgCount-1) {
		curImg = 0;
	}
	document.getElementById("curImg").innerHTML = curImg+1;
	document.images['machine'].src = mgImages[curImg][0];
	document.images['machine'].width = mgImages[curImg][1];
	document.images['machine'].height = mgImages[curImg][2];
}

function preloadMenu() {
	preld = new Array("home","deptandequipment","quality","photos","about","employment","contact");
	
	preldImgAr = new Array();
	for(i in preld) {
		srcStr = "images/nav-"+preld[i]+"-hi.gif";
		preldImgAr[i] = new Image();
		preldImgAr[i].src = srcStr;
	}
}