function Up(index, group) {
	if (document.images)
		document.images['nav' + group + '_' + index].src = eval('nav' + group + 'img2')[index].src
}

function Down(index, group) {
	if (document.images)
		document.images['nav' + group + '_' + index].src = eval('nav' + group + 'img1')[index].src
}
function getObj(name, ref) {
  if (document.getElementById) {
  	this.obj = document.getElementById(name);
		if(this.obj) 
			this.style = document.getElementById(name).style;
  }
  else if (document.all) {
		this.obj = document.all[name];
		if(this.obj)
			this.style = document.all[name].style;
  }
  else if (document.layers) {
   	this.obj = document.layers[name];
		if(this.obj)
	   	this.style = document.layers[name];
  }
	return this.obj; //secondary functionality returns reference to obj
}

function findPosY(obj){
	var curtop = 0;
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;
	return curtop;
}

function findPosX(obj){
	var curleft = 0;
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}

//****************************
//** FROM: somewhere. Seen these functions elsewhere too many times to properly credit
//***************************
function setOpacity(obj, opacity) {
  opacity = (opacity == 100)?99.999:opacity;
  // IE/Win
  obj.style.filter = "alpha(opacity:"+opacity+")";
  // Safari<1.2, Konqueror
  obj.style.KHTMLOpacity = opacity/100;
  // Older Mozilla and Firefox
  obj.style.MozOpacity = opacity/100;
  // Safari 1.2, newer Firefox and Mozilla, CSS3
  obj.style.opacity = opacity/100;
}

function fadeIn(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 10;
      window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
    }
  }
}


function ImgRotator (objId,speed)
{
	this.objId = objId; // VARIABLE SHOULD BE NAMED THIS AS WELL
	this.obj = getObj(objId);
	this.speed = speed;
	this.ImgSrc = new Object();
	this.ImgAlt = new Object();
	this.curIndex =  0;
	this.count = 0;
	this.started = false;
	this.preloaded = false;
	if (this.obj) { this.addImage(this.obj.src,this.obj.alt);	this.curIndex++; }
	
}

var IR = ImgRotator.prototype;

IR.addImage = function(source,alt) { this.ImgSrc[this.count] = source; this.ImgAlt[this.count++] = alt; }
IR.preloadImages = function() { for(i=0;i < this.count;i++) {  var img= new Image(); img.src = this.ImgSrc[i]; } this.preloaded = true; }
IR.beginSlideShow = function() { if (!this.obj) return; this.obj.onload = function() { this.started = true; setTimeout("eval("+this.id+").showImage()",eval(this.id).speed); } }
IR.showImage = function () {
	if (this.obj.parentNode){
		this.obj.parentNode.style.backgroundImage = 'url('+this.obj.src+')';
	}
	this.obj.title = this.ImgAlt[this.curIndex];
	this.obj.alt = this.ImgAlt[this.curIndex];
	this.obj.src = this.ImgSrc[this.curIndex];
	this.curIndex++; this.curIndex %= this.count;
	
	fadeIn(this.objId,0);
}