//ロールオーバーのスクリプト
function smartRollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}







//サムネールの切り替え
function myChgPic(myPicURL){
   document.images["myBigImage"].src = myPicURL;
}





// 矢印での切り替え
var i=1;

function nextpic() {
	if(i<5) {
	i++
	};

img1.src = "bp" + i + ".jpg";
}


function goback(){
	if(i>1){
	i--
	};

img1.src = "bp" + i + ".jpg";
}