// IXF1.11 :: Image cross-fade 
// *****************************************************
// DOM scripting by brothercake -- http://www.brothercake.com/
//******************************************************

//global object
var ixf = { 'clock' : null, 'count' : 1 }

/*******************************************************
/*****************************************************************************
 List the images that need to be cached
*****************************************************************************/

ixf.imgs = Array();
ixf.zIndex = 900;

function cacheImages () {
	ixf.imgs = pictures;

	/*****************************************************************************
	*****************************************************************************/
	
	//cache the images
	ixf.imgsLen = ixf.imgs.length;
	ixf.cache = [];
	for(var i=0; i<ixf.imgsLen; i++)
	{
		ixf.cache[i] = new Image;
		ixf.cache[i].src = ixf.imgs[i];
	}
}


//crossfade setup function

function crossfade()
{

	counter++;
	quot = (counter%(pictures.length));

	//if the timer is not already going
	if(ixf.clock == null)
	{
		//copy the image object 
		ixf.obj = arguments[0];

		//copy the image src argument 
		ixf.src = arguments[1];

		//store the supported form of opacity
		if(typeof ixf.obj.style.opacity != 'undefined')
		{
			ixf.type = 'w3c';
		}
		else if(typeof ixf.obj.style.MozOpacity != 'undefined')
		{
			ixf.type = 'moz';
		}
		else if(typeof ixf.obj.style.KhtmlOpacity != 'undefined')
		{
			ixf.type = 'khtml';
		}
		else if(typeof ixf.obj.filters == 'object')
		{
			//weed out win/ie5.0 by testing the length of the filters collection (where filters is an object with no data)
			//then weed out mac/ie5 by testing first the existence of the alpha object (to prevent errors in win/ie5.0)
			//then the returned value type, which should be a number, but in mac/ie5 is an empty string
			ixf.type = (ixf.obj.filters.length > 0 && typeof ixf.obj.filters.alpha == 'object' && typeof ixf.obj.filters.alpha.opacity == 'number') ? 'ie' : 'none';
		}
		else
		{
			ixf.type = 'none';
		}

		if(ixf.type == 'none' && crossIE == 'ie') {
			ixf.type = 'ie';
		}
		
		//change the image alt text if defined
		if(typeof arguments[3] != 'undefined' && arguments[3] != '')
		{
			ixf.obj.alt = arguments[3];
		}

		
		//if any kind of opacity is supported
		if(ixf.type != 'none')
		{
			//create a new image object and append it to body
			//detecting support for namespaced element creation, in case we're in the XML DOM
			//ixf.newimg = document.getElementsByTagName('body')[0].appendChild((typeof document.createElementNS != 'undefined') ? document.createElementNS('http://www.w3.org/1999/xhtml', 'img') : document.createElement('img'));
		

			if(ixf.type != 'ie') {

				ixf.newimg = $('<img src="' + ixf.src + '" class="idupe" />').appendTo(ixf.obj.parentNode);//.insertBefore($(document.body).children()[0]);

				ixf.newimg.css({
					position: "absolute",
					zIndex: "9",
//					left: ixf.getRealPosition(ixf.obj, 'x') + 'px',
					left: '0px',
//					top: ixf.getRealPosition(ixf.obj, 'y') + 'px'
					top: '0px'
				});
			}
			else {
/*				ixf.newimg = new Image();
				$(ixf.newimg).load(function() {
					$(this).appendTo(ixf.obj.parentNode);
				});
				
				ixf.newimg.src = ixf.src;
				ixf.newimg.className = 'idupe';
*/				
				if (!ixf.newimg) {
					ixf.newimg = $('<img src="' + ixf.src + '" class="idupe" />').appendTo(ixf.obj.parentNode);
					
					ixf.newimg.css({
						position: "absolute",
						zIndex: (ixf.zIndex++) + "",
	//					left: ixf.getRealPosition(ixf.obj, 'x') + 'px',
						left: "0px",
	//					top: ixf.getRealPosition(ixf.obj, 'y') + 'px'
						top: "0px"
					}).hide();
				}
				ixf.newimg.hide();
//				ixf.obj.style.zIndex = '1';
/*				
				ixf.newimg.style.position = "absolute";
				ixf.newimg.style.zIndex = "9";
				ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
//				ixf.newimg.style.left = '0px';
				ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
//				ixf.newimg.style.top = '0px';
*/			/*	
				ixf.obj.style.position = "absolute";
				ixf.obj.style.zIndex = "1";
				ixf.obj.style.left = '0px';
				ixf.obj.style.top = '0px';
*/			}
			//set positioning classname
//			ixf.newimg.className = 'idupe';
			
			//set src to new image src
//			ixf.newimg.src = ixf.src;
			
			//move it to superimpose original image
//			ixf.newimg.style.position = "absolute";
//			ixf.newimg.style.zIndex = "9";
//			ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
//			ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
			
			//copy and convert fade duration argument 
			ixf.length = parseInt(arguments[2], 10) * 1000;
			
			//create fade resolution argument as 20 steps per transition
			ixf.resolution = parseInt(arguments[2], 10) * 20;
			
			//start the timer
			ixf.clock = setInterval('ixf.crossfade()', ixf.length/ixf.resolution);
		}
		
		//otherwise if opacity is not supported
		else
		{
			//just do the image swap
			ixf.obj.src = ixf.src;
		}
		
	}
};


//crossfade timer function
ixf.crossfade = function()
{
	//decrease the counter on a linear scale
	ixf.count -= (1 / ixf.resolution);
	
	//if the counter has reached the bottom
	if(ixf.count < (1 / ixf.resolution))
	{
		//clear the timer
		clearInterval(ixf.clock);
		ixf.clock = null;
		
		//reset the counter
		ixf.count = 1;
		
		//set the original image to the src of the new image
		ixf.obj.src = ixf.src;
	}
	
	//set new opacity value on both elements
	//using whatever method is supported
//	console.log(ixf.type);
	switch(ixf.type)
	{
		case 'ie' :
//			ixf.obj.filters.alpha.opacity = ixf.count * 100;
			ixf.obj.style.filter = 'alpha(opacity=' + ixf.count * 100 + ')';
//			ixf.obj.style.filter = 'alphe(opacity=' + (ixf.count == 1 ? 0.9999999 : ixf.count) + ')';
//			ixf.obj.css('filter', 'Alpha(opacity=' + ixf.count * 100 + ')');
//			ixf.obj.css('opacity', ixf.count * 100);

//			ixf.newimg.filters.alpha.opacity = (1 - ixf.count) * 100;
//			ixf.newimg.style.filter = 'Alpha(opacity=' + (1 - ixf.count) * 100 + ')';
//			ixf.newimg.css('filter', 'alpha(opacity=' + (1 - ixf.count) * 100 + ')');
			ixf.newimg.css('opacity', (1 - ixf.count));
//			console.log(ixf.newimg.filters.alpha.opacity);

			break;
			
		case 'khtml' :
			ixf.obj.style.KhtmlOpacity = ixf.count;
			ixf.newimg.style.KhtmlOpacity = (1 - ixf.count);
			break;
			
		case 'moz' : 
			//restrict max opacity to prevent a visual popping effect in firefox
			ixf.obj.style.MozOpacity = (ixf.count == 1 ? 0.9999999 : ixf.count);
			ixf.newimg.style.MozOpacity = (1 - ixf.count);
			break;
			
		default : 
			//restrict max opacity to prevent a visual popping effect in firefox
			ixf.obj.style.opacity = (ixf.count == 1 ? 0.9999999 : ixf.count);
//			ixf.newimg.style.opacity = (1 - ixf.count);
			ixf.newimg.css('opacity', (1 - ixf.count));
	}
	
	//now that we've gone through one fade iteration 
	//we can show the image that's fading in
	if(ixf.type == 'ie') {
//		ixf.newimg.style.visibility = 'visible';
		ixf.newimg.css({visibility: 'visible'});
	}
	else {
		ixf.newimg.css('visibility', 'visible');
	}
	
	//keep new image in position with original image
	//in case text size changes mid transition or something
	if(ixf.type == 'ie') {
//		ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
//		ixf.newimg.style.left = '0px';
//		ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
//		ixf.newimg.style.top = '0px';
		ixf.newimg.css({
//			left: ixf.getRealPosition(ixf.obj, 'x') + 'px',
			left: '0px',
//			top: ixf.getRealPosition(ixf.obj, 'y') + 'px'
			top: '0px'
		});
	}
	else {
		ixf.newimg.css({
//			left: ixf.getRealPosition(ixf.obj, 'x') + 'px',
			left: '0px',
//			top: ixf.getRealPosition(ixf.obj, 'y') + 'px'
			top: '0px'
		});
	}
	//if the counter is at the top, which is just after the timer has finished
	if(ixf.count == 1)
	{
		//remove the duplicate image
		if(ixf.type == 'ie') {
//			ixf.newimg.parentNode.removeChild(ixf.newimg);
			ixf.newimg.hide();
		}
		else {
			ixf.newimg.hide();
		}
	}
};


(function($) {


	var current = 0;


	Via.slideshow = function(images, id, count, interval) {
		for(i=0; i <= count; i++) {
			if(i > 0) {
				$('#' + id + '-' + i).hide();	
			}
		}
		
		
		window.setInterval(function() {
			sliding(id);
		}, interval);
	}
	
	function sliding(id) {
		$('#' + id + '-' + current).fadeOut(5000);
		current++;
		if ($('#' + id + '-' + current).length < 1) {
			current = 0;	
		}
		$('#' + id + '-' + current).fadeIn(5000);
	}
	

})(jQuery);

/*
function slideImages(images, id, count, interval) {
	for(i=0; i <= count; i++) {
		if(i > 0) {
			$('#' + id + '-' + i).hide();	
		}
	}
	
	window.setTimeout('sliding(' + id + ')', interval);
}

function sliding(id) {
	$('#' + id + '-0').hide('slow');
	$('#' + id + '-1').show('slow');
}
*/