isIE = (navigator.appName == 'Microsoft Internet Explorer');
isV5 = (parseFloat(navigator.appVersion)>=5.0);

if (document.images) {
	rollOvers = 1;
} else {
	rollOvers = 0;
}

loaded = 0;

function loadImg() {
	if (rollOvers) {
		menu01On = new Image();
		menu01On.src = "img/e_teatro2.jpg";
		menu02On = new Image();
		menu02On.src = "img/teatro_over.gif";
		menu03On = new Image();
		menu03On.src = "img/guide_over.gif";
		menu04On = new Image();
		menu04On.src = "img/event_over.gif";
		menu05On = new Image();
		menu05On.src = "img/infor_over.gif";
		menu06On = new Image();
		menu06On.src = "img/access_over.gif";
		menu07On = new Image();
		menu07On.src = "img/siyou_over.gif";
		menu08On = new Image();
		menu08On.src = "img/uketuke_over.gif";
		menu09On = new Image();
		menu09On.src = "";
		menu10On = new Image();
		menu10On.src = "";

		menu01Off = new Image();
		menu01Off.src = "img/e_teatro1.jpg";
		menu02Off = new Image();
		menu02Off.src = "img/teatro.gif";
		menu03Off = new Image();
		menu03Off.src = "img/guide.gif";
		menu04Off = new Image();
		menu04Off.src = "img/event.gif";
		menu05Off = new Image();
		menu05Off.src = "img/infor.gif";
		menu06Off = new Image();
		menu06Off.src = "img/access.gif";
		menu07Off = new Image();
		menu07Off.src = "img/siyou.gif";
		menu08Off = new Image();
		menu08Off.src = "img/uketuke.gif";
		menu09Off = new Image();
		menu09Off.src = "";
		menu10Off = new Image();
		menu10Off.src = "";
		loaded = 1;
	}
}

function switchOn(imgName) {
	if (loaded == 1) {
		imgOn = eval(imgName+"On.src");
		document[imgName].src = imgOn;
	}
}

function switchOff(imgName) {
	if (loaded == 1) {
		imgOff = eval(imgName+"Off.src");
		document[imgName].src = imgOff;
	}
}

if (isIE || isV5) {
	loadImg();
}