//ロード時サイズ表を非表示
window.onload = function(){
	var delTab = document.getElementById("tab-beta");
	var rollOver = document.getElementById("tab01");
	delTab.style.display = "none"
	
	rollOver.firstChild.className = "onBtn";
	var tab01 = document.getElementById("tab01");
	var tab02 = document.getElementById("tab02");
	if(tab02 && tab02.firstChild &&tab02.firstChild.href){ 
    addListener(tab01, "click", switchTab1);
    addListener(tab02, "click", switchTab2);
	}
}
//タブで切り替え

//イベントリスナー・リムーブリスナー
function addListener(eventTarget, eventType, eventListener)
{
    if(eventTarget.addEventListener){
        eventTarget.addEventListener(eventType, eventListener, false);
    }else if(eventTarget.attachEvent){
        eventTarget.attachEvent("on"+eventType, eventListener);
    }
}

//タブの挙動
function switchTab1(){
	var tabAlpha = document.getElementById("tab-alpha");
	var tabBeta = document.getElementById("tab-beta");
	var tab01 = document.getElementById("tab01");
	var tab02 = document.getElementById("tab02");

	tabAlpha.style.display = "block";
	tabBeta.style.display = "none";
	
	tab01.firstChild.className = "onBtn";
	tab02.firstChild.className = "";
}
function switchTab2(){
	var tabAlpha = document.getElementById("tab-alpha");
	var tabBeta = document.getElementById("tab-beta");
	var tab01 = document.getElementById("tab01");
	var tab02 = document.getElementById("tab02");

	tabAlpha.style.display = "none";
	tabBeta.style.display = "block";
	
	tab01.firstChild.className = "";
	tab02.firstChild.className = "onBtn";
}