if (navigator.appVersion > "3")
{
img0 = new Image(); img0.src = "../icon/nexton.gif";
img1 = new Image(); img1.src = "../icon/next.gif";

img2 = new Image(); img2.src = "../icon/backon.gif";
img3 = new Image(); img3.src = "../icon/back.gif";
}
function imgChange(imgName,imgNum)
{
	if (navigator.appVersion > "3")
	{
		document.images[imgName].src = eval(imgNum + ".src");
	}
}