/* ======================================================================== */
/*
/* // Preload Images better performance on slide show
/* PreloadImages(arrSlideShow);
/* 
/* // starting SlideShow
/* SlideShow();
*/

// init vars
var iTimeoutId;
var iSlideShowIndex = 0;

///
// Get next image from arrSlideShow
function GetNextImage() {
	++iSlideShowIndex;
	
	if(iSlideShowIndex >= arrSlideShow.length) {
		iSlideShowIndex = 0;
	}
	return(arrSlideShow[iSlideShowIndex]);
}

///
// SlideShow
// @param1 :: Fade Duration
// @param2 :: Interval between pictures
function SlideShow(iFadeDuration, iInterval) {
	var oPicture = document.getElementById("imgSlideShow");
	var oLink = document.getElementById("hlSlideShow");
	var oIni = GetNextImage();
	var strAlt = oIni[0];
	var strClass = oIni[1];
	var strSrc = oIni[2];
	var strUrl = oIni[3];
	
	// image
	opacity('imgSlideShow', 0, 200, iFadeDuration)
	oPicture.src = strSrc;
	oPicture.style.display = (oPicture.src == "") ? "none" : "";
	
	// hyperlink
	oLink.href = strUrl;
	
	// timer
	var myCallback = "SlideShow(" +iFadeDuration + "," + iInterval + ")"
	iTimeoutId = setTimeout(myCallback, iInterval);
}

///
// Preloads images
function PreloadImages(args)
{ 
  document.imageArray = new Array(args.length);
  for(var i=0; i<args.length; i++)
  {
    document.imageArray[i] = new Image;
    document.imageArray[i].src = args[i];
  }
}




/* ======================================================================== */
/* Library for cross-platform fading ====================================== */
/* http://brainerror.net/scripts/javascript/blendtrans/ ================== */

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)
}