var imgPath = "/images/";

Event.observe(window, 'load', chgimg, false);
function chgimg() {
btnObj = document.getElementsByClassName("btn"); //ロールオーバーさせたい画像につけるクラス名


$A(btnObj).each(function(obj){
Event.observe(obj, "mouseover", over, false);
Event.observe(obj, "mouseout", out, false);
});

}

function over(event){
	var eID = Event.element(event);
	$(eID.id).setAttribute("src",imgPath+eID.id+"_f2.jpg"); //オーバーしたとき

}

function out(event){
	var eID = Event.element(event);
	$(eID.id).setAttribute("src",imgPath+eID.id+".jpg");//アウトしたとき
}





function openMap() {
window.open('/map.html', 'map','width=550, height=550');
}