var rotatingImages = new Array();


function fade(id, opacStart, opacEnd, millisec)
{
	changeOpac(0, id);
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd)
	{
        for(i = opacStart; i >= opacEnd; i--)
		{
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
	else if(opacStart < opacEnd)
	{
        for(i = opacStart; i <= opacEnd; i++)
        {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

function changeOpac(opacity, id)
{
	var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}

function newPhoto()
{
	if(index == indexMax) { nextIndex = 1; }
	else { nextIndex = (index+1); }
	fade('photo', 0, 100, 1000);
	/*document.getElementById('photo').innerHTML = '<img src=\"Templates/img/photos/home.jpg\"/>';
	else
	*/
	if(rotatingImages[index] != undefined) document.getElementById('photo').innerHTML = '<img src=\"' + rotatingImages[index] + '\"/>';
	if(index == indexMax)
	{
		index = 0;
	}
	else
	{
		index++;
	}
	setTimeout(newPhoto, 6000);
	setTimeout(fadePhoto, 5000);
}

function fadePhoto()
{
	document.getElementById('photo2').innerHTML = '<img src=\"' +rotatingImages[nextIndex] + '\"/>';
	fade('photo2', 0, 100, 1000);
}


// correctly handle PNG transparency in Win IE 5.5 & 6.
function correctPNG()
{
   var arVersion = navigator.appVersion.split("MSIE")
   var version = parseFloat(arVersion[1])
   if ((version >= 5.5) && (document.body.filters)) 
   {
      for(var i=0; i<document.images.length; i++)
      {
         var img = document.images[i]
         var imgName = img.src.toUpperCase()
         if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
         {
            var imgID = (img.id) ? "id='" + img.id + "' " : ""
            var imgClass = (img.className) ? "class='" + img.className + "' " : ""
            var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
            var imgStyle = "display:inline-block;" + img.style.cssText 
            if (img.align == "left") imgStyle = "float:left;" + imgStyle
            if (img.align == "right") imgStyle = "float:right;" + imgStyle
            if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
            var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
            img.outerHTML = strNewHTML
            i = i-1
         }
      }
   }    
}

function preloadImages(files)
{
	for(var i=0; i<files.length; i++)
	{
		var image = new Image();
		image.src = files[i];
		rotatingImages.push(files[i]);
	}
}