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);
}



//LOVEのエキスパンドメニュー
function tree2(menu_class,menu_id) {
 var div=document.getElementById(menu_id);
 if (div.style.display == "block") div.style.display="none";
 else {
  var sib=div.parentNode.childNodes;
  for (var i=0; i < sib.length; i++)
   if (sib[i].className == menu_class) sib[i].style.display="none";
  div.style.display="block";
 }
}