// JavaScript Document

	var numOfBtn = 10;
	var onImgs = new Array(numOfBtn);
	var offImgs = new Array(numOfBtn);
	
		function init() {
			for (i=0; i < numOfBtn; i++){
			onImgs[i] = new Image();
			onImgs[i].src = "img/link/btn" + (i + 1) + "-on.gif";
			offImgs[i] = new Image();
			offImgs[i].src ="img/link/btn" + (i + 1) + "-off.gif";
			}
		}
		
	function swap(img, num, isOn){
		num = num -1;
		if (isOn){
			img.src = onImgs[num].src;
			} else {
				img.src = offImgs[num].src;
				}
			}