Pic = new Array("images/toppage/small/s01.jpg","images/toppage/small/s02.jpg","images/toppage/small/s03.jpg","images/toppage/small/s04.jpg","images/toppage/small/s05.jpg","images/toppage/small/s06.jpg","images/toppage/small/s07.jpg","images/toppage/small/s08.jpg","images/toppage/small/s09.jpg","images/toppage/small/s10.jpg","images/toppage/small/s11.jpg","images/toppage/small/s12.jpg","images/toppage/small/s13.jpg","images/toppage/small/s14.jpg","images/toppage/small/s15.jpg","images/toppage/small/s16.jpg","images/toppage/small/s17.jpg"); //表示したい画像のURL
image = 0;
function swapThumbnail(){
	document.getElementById("swapThumbnail").src = Pic[image];
	image++;
	if( image==17 ){//使用する画像の枚数
		image = 0; //表示する回数　0で無限
	    setTimeout("swapThumbnail()",15000); //表示される時間の間隔（秒数）
	} else {
	    setTimeout("swapThumbnail()",5000); //表示される時間の間隔（秒数）
    }
}