// メニューの画像入れ替え

function menu(name,img) {
	if (document.images) {
	document.images[name].src = img;
	}
}


// タブ切り替え
function show1(){
	content1.style.display="block";
	content2.style.display="none";
	content3.style.display="none";
	content4.style.display="none";
}

function show2(){
	content1.style.display="none";
	content2.style.display="block";
	content3.style.display="none";
	content4.style.display="none";
}

function show3(){
	content1.style.display="none";
	content2.style.display="none";
	content3.style.display="block";
	content4.style.display="none";
}

function show4(){
	content1.style.display="none";
	content2.style.display="none";
	content3.style.display="none";
	content4.style.display="block";
}