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) {
/* 1 class */
		navi1On = new Image();
		navi1On.src = "img/navi01_ovr.gif";
		navi2On = new Image();
		navi2On.src = "img/navi02_ovr.gif";
		navi3On = new Image();
		navi3On.src = "img/navi03_ovr.gif";
		navi4On = new Image();
		navi4On.src = "img/navi04_ovr.gif";
		navi5On = new Image();
		navi5On.src = "img/navi05_ovr.gif";
		navi6On = new Image();
		navi6On.src = "img/navi06_ovr.gif";
		navi7On = new Image();
		navi7On.src = "img/navi07_ovr.gif";
/* 2 class */
		navi01On = new Image();
		navi01On.src = "../img/navi01_ovr.gif";
		navi02On = new Image();
		navi02On.src = "../img/navi02_ovr.gif";
		navi03On = new Image();
		navi03On.src = "../img/navi03_ovr.gif";
		navi04On = new Image();
		navi04On.src = "../img/navi04_ovr.gif";
		navi05On = new Image();
		navi05On.src = "../img/navi05_ovr.gif";
		navi06On = new Image();
		navi06On.src = "../img/navi06_ovr.gif";
		navi07On = new Image();
		navi07On.src = "../img/navi07_ovr.gif";
		
/* 1 class */
        navi1Off = new Image();
		navi1Off.src = "img/navi01.gif";
		navi2Off = new Image();
		navi2Off.src = "img/navi02.gif";
		navi3Off = new Image();
		navi3Off.src = "img/navi03.gif";
		navi4Off = new Image();
		navi4Off.src = "img/navi04.gif";
		navi5Off = new Image();
		navi5Off.src = "img/navi05.gif";
		navi6Off = new Image();
		navi6Off.src = "img/navi06.gif";
		navi7Off = new Image();
		navi7Off.src = "img/navi07.gif";
/* 2 class */
        navi01Off = new Image();
		navi01Off.src = "../img/navi01.gif";
		navi02Off = new Image();
		navi02Off.src = "../img/navi02.gif";
		navi03Off = new Image();
		navi03Off.src = "../img/navi03.gif";
		navi04Off = new Image();
		navi04Off.src = "../img/navi04.gif";
		navi05Off = new Image();
		navi05Off.src = "../img/navi05.gif";
		navi06Off = new Image();
		navi06Off.src = "../img/navi06.gif";
		navi07Off = new Image();
		navi07Off.src = "../img/navi07.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();
}