/*************************************
*  frontpage fader - non php version
*  v1.0 / 20090817
*  (c) cryoutcreations
**************************************/

function dummy() {
// i do nothing
}

function opacity(id, opacStart, opacEnd, millisec) {
	//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++;
		}
	}
}

//change the opacity for different browsers
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 shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";

	//make image transparent
	changeOpac(0, imageid);

	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;

	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}

/*var slideCache = new Array();
function RunSlideShow(divid,imageid,imageFiles,displaySecs)
{
 var imageSeparator = imageFiles.indexOf(";");
 var nextImage = imageFiles.substring(0,imageSeparator);

 changeOpac(0, imageid);
 blendimage(divid,imageid,nextImage,1000);

 var futureImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;
 setTimeout("RunSlideShow('"+divid+"','"+imageid+"','"+futureImages+"',"+displaySecs+")",displaySecs*1000);

 // Cache the next image to improve performance.
 imageSeparator = futureImages.indexOf(";");
 nextImage = futureImages.substring(0,imageSeparator);
 if (slideCache[nextImage] == null)
     {
     slideCache[nextImage] = new Image;
     slideCache[nextImage].src = nextImage;
     }
}*/

var images = [
'img/up002.jpg',
'img/up003.jpg',
'img/up004.jpg',
'img/up001.jpg'
];
var count = 3;
var poz = 0;

function theShow() { // main fader function
blendimage('fader-div','fader-img',images[poz],1000);
if (poz>=count) {poz=0;}
  else {poz+=1;};
}

setInterval("theShow()",3000); // start the fader
//RunSlideShow("fader-div","fader-img","img/up001.jpg;img/up002.jpg;img/up003.jpg;img/up004.jpg",3);