var homepageULID = 'homepage_images';
var	homepageUL;
var homepageImages;
var iCurrentImage;
var iPreviousImage;
var preInitTimer;
var fadeDelay = 4000;

preInit();

function preInit()
{
	if ((document.getElementById)&&(homepageUL=document.getElementById(homepageULID)))
  {
    homepageUL.style.display = "none";
		homepageUL.style.visibility = "hidden";

		if (typeof preInitTimer != 'undefined')
    {
      clearTimeout(preInitTimer);
    }
	}
  else
  {
		preInitTimer = setTimeout("preInit()",1);
	}
}

function doFade(imgImageNumber,opacity)
{
  var obj = homepageImages[imgImageNumber];
  if (obj.style)
  {
    if (obj.style.MozOpacity != null)
    {
      obj.style.MozOpacity = (opacity / 100) - .001;
    }
    else if (obj.style.opacity != null)
    {
      obj.style.opacity = (opacity / 100) - .001;
    }
    else if (obj.style.filter != null)
    {
      obj.style.filter = "alpha(opacity="+opacity+")";
    }
  }
}

function fadeInit()
{
  if ((document.getElementById)&&(homepageUL=document.getElementById(homepageULID)))
  {
    preInit();
    homepageImages = new Array;

    var node = homepageUL.firstChild;

    while (node)
    {
      if (node.nodeType==1)
      {
        homepageImages.push(node);
      }

      node = node.nextSibling;
    }

    for(i = 0; i < homepageImages.length; i++)
    {
      homepageImages[i].style.position='absolute';
      homepageImages[i].style.top=0;
      homepageImages[i].style.zIndex=0;
      doFade(i,0);
    }

    homepageUL.style.display = "block";
    homepageUL.style.visibility = 'visible';

    iCurrentImage  = 0;
    iPreviousImage = homepageImages.length - 1;
    opacity = 100;
    doFade(iCurrentImage,100);

    //only start if there are enough homepage images to loop through
    if(homepageImages.length > 1)
    {
      window.setTimeout("doCrossFade(100)", fadeDelay);
    }
  }
}

function doCrossFade(opacity)
{
  if (opacity < 100)
  {
    doFade(iCurrentImage,opacity);
    opacity += 3;
    window.setTimeout("doCrossFade("+opacity+")", 40);
  }
  else
  {
    doFade(iPreviousImage,0);
    iPreviousImage = iCurrentImage;
    iCurrentImage += 1;

    if (iCurrentImage >= homepageImages.length)
    {
      iCurrentImage = 0;
    }

    homepageImages[iPreviousImage].style.zIndex = 0;
    homepageImages[iCurrentImage].style.zIndex  = 100;

    opacity = 0;
    window.setTimeout("doCrossFade("+opacity+")", fadeDelay);
  }
}

addEvent(window,'load',fadeInit)

function addEvent(elm, evType, fn, useCapture)
{
  if (elm.addEventListener)
  {
    elm.addEventListener(evType, fn, useCapture);
    return true;
  }
  else if (elm.attachEvent)
  {
    var r = elm.attachEvent("on"+evType, fn);
    return r;
  }
}