dom.event.addEventListener(window, "load", change);

function change() {
	var left01 = util.$('left01');
	var right01 = util.$('right01');
	
	var left02 = util.$('left02');
	var right02 = util.$('right02');
	
	var left03 = util.$('left03');
	var right03 = util.$('right03');
	
	var left04 = util.$('left04');
	var right04 = util.$('right04');
	
	dom.event.addEventListener(right01, "click", onRight01);
	dom.event.addEventListener(right02, "click", onRight02);
	dom.event.addEventListener(right03, "click", onRight03);
	
	dom.event.addEventListener(left02, "click", onLeft02);
	dom.event.addEventListener(left03, "click", onLeft03);
	dom.event.addEventListener(left04, "click", onLeft04);
	
}

function onRight01() {
		util.$('sw01').style.display = "none";
		util.$('sw02').style.display = "block";
		util.$('sw03').style.display = "none";
		util.$('sw04').style.display = "none";
}

function onRight02() {
		util.$('sw01').style.display = "none";
		util.$('sw02').style.display = "none";
		util.$('sw03').style.display = "block";
		util.$('sw04').style.display = "none";
}

function onRight03() {
		util.$('sw01').style.display = "none";
		util.$('sw02').style.display = "none";
		util.$('sw03').style.display = "none";
		util.$('sw04').style.display = "block";
}

function onLeft02() {
		util.$('sw01').style.display = "block";
		util.$('sw02').style.display = "none";
		util.$('sw03').style.display = "none";
		util.$('sw04').style.display = "none";
}

function onLeft03() {
		util.$('sw01').style.display = "none";
		util.$('sw02').style.display = "block";
		util.$('sw03').style.display = "none";
		util.$('sw04').style.display = "none";
}

function onLeft04() {
		util.$('sw01').style.display = "none";
		util.$('sw02').style.display = "none";
		util.$('sw03').style.display = "block";
		util.$('sw04').style.display = "none";
}