var swImg; swImg=new Array;

function preload()
{
	var imgName = preload.arguments[0];
	swImg[imgName] = new Array;
	for (cnt = 1; cnt < preload.arguments.length; cnt++) {
		swImg[imgName][cnt-1] = new Image();
		swImg[imgName][cnt-1].src = preload.arguments[cnt];
	}
}
// swap: 画像入れ換え
//
function swap(imgName, imgNum)
{
	document.images[imgName].src = swImg[imgName][imgNum].src;
}