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."));
				}
			}
		}
	}
	var leftCon = document.getElementById("sideBox");
	if(leftCon != null) //20100819 Mori Syusei
	{
		var leftImg = leftCon.getElementsByTagName("p");
		for(var i=0; i < leftImg.length; i++) {
			var swapImg = leftImg[i].getElementsByTagName("img");
			swapImg.onmouseover = function() {
				this.setAttribute("src", this.getAttribute("src").replace(".jpg", "_on.jpg"));
			}
			swapImg.onmouseout = function() {
				this.setAttribute("src", this.getAttribute("src").replace("_on.jpg", ".jpg"));
			}
		}
	}
}

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