var currentPage = "blank";
var browserVer = navigator.appVersion.charAt(0);

	goannai_on = new Image();
	goannai_on.src =  "../img/bu_goannai_g.gif";
	goannai_off = new Image();
	goannai_off.src =  "../img/bu_goannai_n.gif";
	//
	noudock_on = new Image();
	noudock_on.src =  "../img/bu_noudock_g.gif";
	noudock_off = new Image();
	noudock_off.src =  "../img/bu_noudock_n.gif";
	//
	nyusen_on = new Image();
	nyusen_on.src =  "../img/bu_nyusen_g.gif";
	nyusen_off = new Image();
	nyusen_off.src =  "../img/bu_nyusen_n.gif";
	//
	gairai_on = new Image();
	gairai_on.src =  "../img/bu_gairai_g.gif";
	gairai_off = new Image();
	gairai_off.src =  "../img/bu_gairai_n.gif";
	//
	sensei_on = new Image();
	sensei_on.src =  "../img/bu_sensei_g.gif";
	sensei_off = new Image();
	sensei_off.src =  "../img/bu_sensei_n.gif";
	//
	iryou_on = new Image();
	iryou_on.src =  "../img/bu_iryou_g.gif";
	iryou_off = new Image();
	iryou_off.src =  "../img/bu_iryou_n.gif";
	//
	kaigo_on = new Image();
	kaigo_on.src =  "../img/bu_kaigo_g.gif";
	kaigo_off = new Image();
	kaigo_off.src =  "../img/bu_kaigo_n.gif";
	//
	jinkou_on = new Image();
	jinkou_on.src =  "../img/bu_jinkou_g.gif";
	jinkou_off = new Image();
	jinkou_off.src =  "../img/bu_jinkou_n.gif";
	//
	nyuin_on = new Image();
	nyuin_on.src =  "../img/bu_nyuin_g.gif";
	nyuin_off = new Image();
	nyuin_off.src =  "../img/bu_nyuin_n.gif";
	//
	kyujin_on = new Image();
	kyujin_on.src =  "../img/bu_kyujin_g.gif";
	kyujin_off = new Image();
	kyujin_off.src =  "../img/bu_kyujin_n.gif";
	//
	koutsu_on = new Image();
	koutsu_on.src =  "../img/bu_koutsu_g.gif";
	koutsu_off = new Image();
	koutsu_off.src =  "../img/bu_koutsu_n.gif";
	//
	kanren_on = new Image();
	kanren_on.src =  "../img/bu_kanren_g.gif";
	kanren_off = new Image();
	kanren_off.src =  "../img/bu_kanren_n.gif";
	//
	home_on = new Image();
	home_on.src =  "../img/bu_home_g.gif";
	home_off = new Image();
	home_off.src =  "../img/bu_home_n.gif";
	//	
	yoyaku_on = new Image();
	yoyaku_on.src =  "noudock_img/bu_yoyaku_g.gif";
	yoyaku_off = new Image();
	yoyaku_off.src =  "noudock_img/bu_yoyaku_n.gif";
	//	

function actOn(imgName)  {
	if(imgName != currentPage) {
		if (browserVer >= 3)   {
			onImg = eval(imgName + "_on.src");
			document [imgName].src = onImg;
		}
	}
}

function actOff(imgName)   {
	if(imgName != currentPage) {
		if (browserVer >= 3) {
			offImg = eval(imgName + "_off.src");
			document [imgName].src = offImg;
		}
	}
}
function actDown(imgName) {
	myImage = imgName;

	// MacのIE4.*では問題が発生するので、処理をスキップ
	if(navigator.userAgent.indexOf("MSIE 4")>=0 
			 && navigator.userAgent.indexOf("Mac")>=0){	
		return;
	}

	if (browserVer >= 3) {
			if (currentPage != "blank") {
				offImg = eval(currentPage + "_off.src");
				document [currentPage].src = offImg;
			}
			currentPage = myImage;
			if (myImage != "blank") {
				downImg = eval(myImage + "_down.src");
				document [myImage].src = downImg;
			}
	}
}

function getCornerName() {
	//自分のコーナー名を取得する（後ろから２つ目と最後のスラッシュの間）
	//パスの取得
	var acFileURL = new String (location.href);
	
	//変数の初期化
	var acSlush;
	var acBeforeSlush;
	var acCornerName;
	if (acFileURL.lastIndexOf("\\") == -1){		//Win IEは / ではなく \ になる
		acSlush = acFileURL.lastIndexOf("/");		//スラッシュの場所を取得
		acBeforeSlush = acFileURL.lastIndexOf("/",acSlush-1);		//２つ目のスラッシュの場所を取得
	} else {
		acSlush = acFileURL.lastIndexOf("\\");
		acBeforeSlush = acFileURL.lastIndexOf("\\",acSlush-1);
	}
	acCornerName = acFileURL.substring (acBeforeSlush+1,acSlush);
	actDown(acCornerName);
}