var bName = navigator.appName;
var bVer = parseInt(navigator.appVersion);
var ns4 = (bName == "Netscape" && bVer >= 4);
var ie4 = (bName == "Microsoft Internet Explorer" && bVer >= 4);
var ns3 = (bName == "Netscape" && bVer < 4);
var ie3 = (bName == "Microsoft Internet Explorer" && bVer < 4);
var tmp = "";
// var cntr =  Math.round(Math.random()*12);
var cntr = 0;


// Preload images
rot1 = new Image();
rot1.src = "graphics/home/rotation/1.jpg";
rot2 = new Image();
rot2.src = "graphics/home/rotation/2.jpg";
rot3 = new Image();
rot3.src = "graphics/home/rotation/3.jpg";
rot4 = new Image();
rot4.src = "graphics/home/rotation/4.jpg";
rot5 = new Image();
rot5.src = "graphics/home/rotation/5.jpg";
rot6 = new Image();
rot6.src = "graphics/home/rotation/6.jpg";
rot7 = new Image();
rot7.src = "graphics/home/rotation/7.jpg";
rot8 = new Image();
rot8.src = "graphics/home/rotation/8.jpg";
rot9 = new Image();
rot9.src = "graphics/home/rotation/9.jpg";
rot10 = new Image();
rot10.src = "graphics/home/rotation/10.jpg";
rot11 = new Image();
rot11.src = "graphics/home/rotation/11.jpg";
rot12 = new Image();
rot12.src = "graphics/home/rotation/12.jpg";


// two simple hide/show functions
function hideIt(id) {
	if (ie4) {
		tmp = 'document.all["' + id + '"].style.visibility="hidden"';
		eval(tmp);
		}
	else {
		tmp = 'document.getElementById("' + id + '").style.visibility="hidden"';
		eval(tmp);
		}
	}

function showIt(id) {
	if (ie4) {
		tmp = 'document.all["' + id + '"].style.visibility="visible"';
		eval(tmp);
		}
	else {
		tmp = 'document.getElementById("' + id + '").style.visibility="visible"';
		eval(tmp);
		}
	}
	

function rollIn(id) {
	var ImgPath = "graphics/nav";
	document [id].src = ImgPath + "/" + id + "-roll.gif";
	}


function rollOut(id) {
	var ImgPath = "graphics/nav";
	document [id].src = ImgPath + "/" + id + ".gif";
	}	

function setup() {
	rotateImg(cntr);
	}

function rotateImg() {
	// alert("cntr = " + cntr);
	for(i = 1; i <= 4; i++) {
		var img = i + (cntr * 4);
		img = img + ".jpg"
		var id = i * 1;
		id = "rot" + id;
		document [id].src = "graphics/home/rotation/" + img;
		}
	setTimeout("rotateImg()",3000);
	cntr++;
	if (cntr > 2) { cntr = 0 };
	}

function rotateImg_old() {
	for(i = 0; i <= 3; i++) {
		var img = i + cntr;
		if (img > 12) { 
			img = img % 12;
			}
		img = img + ".jpg"
		var id = i + 1;
		id = "rot" + id;
		document [id].src = "graphics/home/rotation/" + img;
		}
	setTimeout("rotateImg()",3000);
	cntr++;
	if (cntr > 12) { cntr = 1 };
	}