// JavaScript Document

function pulldownmenu(sub)
{
	
	//開くサブメニューのID
	var submenu = "submenu" + sub ;
	
	for(i=1;i<4;i++){
		var submenu_i =  "submenu" + i ;
		if(i!=sub){ document.getElementById(submenu_i).style.display="none"; }
	}
	
			
	if(document.getElementById(submenu).style.display == "none"){
		document.getElementById(submenu).style.display = "block";
	}else{
		document.getElementById(submenu).style.display = "none";
	}
}




//ロールオーバー

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);
}