/////////////////////////////////////////////////////////////
//　レイヤー系
/////////////////////////////////////////////////////////////

var onLayer;
onLayer="no";
flaVisi ="no";

// ブラウザごとのレイヤー処理方法////////////////////////////////////////////
if (NS4 || IE4) {
	if (navigator.appName == "Netscape") {
		layerStyleRef="layer.";
		layerRef="document.layers";
		styleSwitch="";
	} else{
		layerStyleRef="layer.style.";
		layerRef="document.all";
		styleSwitch=".style";
	}
}

var contentsWidth=930;
var scrX,scrY;
function getLeftPoint(){

	if(NS4){
		scrX = innerWidth;
		scrY = innerHeight;
	} else {
	
		scrX = document.body.clientWidth;
		scrY = document.body.clientHeight;
	}
	if(scrX < 930 ){scrX =930;}
	leftPoint = Math.floor((scrX/2)-(contentsWidth/2));
	//alert(leftPoint);
	if (NN6) {
		document.getElementById("nvEx").style.left=492+leftPoint;
		//document.getElementById("nvCl").style.left=549+leftPoint;
		//document.getElementById("nvCm").style.left=641+leftPoint;
	} else if (NS4 || IE4) {
		eval(layerRef+'["nvEx"]'+styleSwitch+'.left='+(492+leftPoint));
		//eval(layerRef+'["nvCl"]'+styleSwitch+'.left='+(549+leftPoint));
		//eval(layerRef+'["nvCm"]'+styleSwitch+'.left='+(641+leftPoint));
	}
}

getLeftPoint();




// メニューを表示////////////////////////////////////////////
function showLayer(layerName){

	getLeftPoint();
	
	if (NN6 || NS4 || IE4) {
		if(onLayer!="no"){hideLayer(onLayer);}
		if (NN6) {
			document.getElementById(layerName).style.visibility="visible";
			if(flaVisi == "on") {
				document.getElementById("topFlash").style.visibility="hidden";
			 	flaVisi="off";
			 }
		} 
		/*
		if (NS4) {
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
			if(flaVisi == "on") {
			alert("kiteru");
				eval(layerRef+'["topFlash"]'+styleSwitch+'.visibility="hidden"');
				flaVisi="off";
			}
		} 
		*/
		if (IE4) {
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
			if(flaVisi == "on") {
				eval(layerRef+'["topFlash"]'+styleSwitch+'.visibility="hidden"');
				flaVisi="off";
			}
		} 
		onLayer = layerName;
	}
}
// メニュー非表示モジュール////////////////////////////////////////////
function hideLayer(layerName){
	
	if (NN6) {
		document.getElementById(layerName).style.visibility="hidden";
		if(flaVisi == "off") {
		document.getElementById("topFlash").style.visibility="visible";
		 flaVisi="on";
		 }
	////} else if (NS4 || IE4) {
	} else if (IE4) {
		eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
		if(flaVisi == "off") {
		eval(layerRef+'["topFlash"]'+styleSwitch+'.visibility="visible"');
		flaVisi="on";
		}
	}
}
function hiddenLayer(){
	
	hideLayer("nvEx");
	//hideLayer("nvCl");
	//hideLayer("nvCm");
	onLayer = "no";
}