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) {
		menu1On = new Image();
		menu1On.src = "../common_img/menu1_over.gif";
		menu2On = new Image();
		menu2On.src = "../common_img/menu2_over.gif";
		menu3On = new Image();
		menu3On.src = "../common_img/menu3_over.gif";
		menu4On = new Image();
		menu4On.src = "../common_img/menu4_over.gif";
		menu01On = new Image();
		menu01On.src = "../../common_img/menu1_over.gif";
		menu02On = new Image();
		menu02On.src = "../../common_img/menu2_over.gif";
		menu03On = new Image();
		menu03On.src = "../../common_img/menu3_over.gif";
		menu04On = new Image();
		menu04On.src = "../../common_img/menu4_over.gif";
		
        menu1Off = new Image();
		menu1Off.src = "../common_img/menu1.gif";
		menu2Off = new Image();
		menu2Off.src = "../common_img/menu2.gif";
		menu3Off = new Image();
		menu3Off.src = "../common_img/menu3.gif";
		menu4Off = new Image();
		menu4Off.src = "../common_img/menu4.gif";
        menu01Off = new Image();
		menu01Off.src = "../../common_img/menu1.gif";
		menu02Off = new Image();
		menu02Off.src = "../../common_img/menu2.gif";
		menu03Off = new Image();
		menu03Off.src = "../../common_img/menu3.gif";
		menu04Off = new Image();
		menu04Off.src = "../../common_img/menu4.gif";
		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();
}