SLIDESHOW_SPLASH = -1;


function _slideshow_removeAttributeNode(obj,attribute) {
	if (obj.getAttributeNode(attribute)) {
		obj.removeAttributeNode(obj.getAttributeNode(attribute));
		
		// horrible ie patch to display changes
		obj.style.visibility = 'hidden';
		obj.style.visibility = 'visible';
	}
}


function _slideshow_preloadImage_checkComplete(img) {
	
	var checkCompleted = 0;
	
	// if image obj
	if (typeof(img) != "undefined") {
	    
		// if incomplete
		if (!(img.complete)) { 
			setTimeout(function() { _slideshow_preloadImage_checkComplete(img); },100);
		
		// if complete
		} else {
		  
			++slideshows_preloader['nbloaded'];
			
			// update info
			if (_slideshows['loaded']) {
				slideshows_preloader['percentage'] = Math.round(slideshows_preloader['nbloaded'] / slideshows_preloader['nbtotal'] * 100);
			}
			
			checkCompleted = 1;
		}
	
	// if none just check if completed
	} else {
		checkCompleted = 1;
	}

	// if check completed to make
	if (checkCompleted) {
		
		// if all images completed
		if (_slideshows['loaded'] && slideshows_preloader['nbloaded'] == slideshows_preloader['nbtotal']) {
			slideshows_preloader['completed'] = 1;
		}
	}
}


function _slideshow_preloadImage(url) {
	var img = new Image();
	img.src = url;

	++slideshows_preloader['nbtotal'];
	_slideshow_preloadImage_checkComplete(img);

	return(img);
}


function _slideshow_buildAbsoluteLink(url) {

	// if no protocol
	if (!(/^\w+\:\/\//.test(url))) {

		// if begins with '/'
		if (url.substring(0,1) == "/") {
			url = window.location.protocol+'//'+window.location.host+url;

		// if other relative
		} else {
			var pathname = '';
			var splitDir  = window.location.pathname.toString().split("/");
			var splitBack = url.split("../");

			
			// if ../ doesn't go too deep
			if (splitDir.length > splitBack.length) {
			
				// build absolute path
				for (i=0; i<(splitDir.length-splitBack.length); i++) {
					 pathname = pathname + splitDir[i] + "/";
				}
				
			// if ../ does go too deep
			} else {
				pathname = '/';
			}
			
			url = window.location.protocol+'//'+window.location.host+pathname+splitBack[splitBack.length-1];
		}	    
	}

	return(url);
}


function _slideshow_initialLinkProcess() {
	
	// process all <a> with rel
	for (var i=0; i<document.getElementsByTagName('a').length; ++i) {
		var link = document.getElementsByTagName('a')[i];
		var functionname = 0;
		
		
		// slideshow_XXX_item
		if ( /^slideshow_[a-zA-Z0-9]+_item$/.test(link.rel)) {
			
			link.slideshow_id   = link.rel.substring(10,link.rel.length-5);
			link.slideshow_type = 'item';
			functionname	     = 'changer';		
		
		// slideshow_XXX_previous
		} else if ( /^slideshow_[a-zA-Z0-9]+_previous$/.test(link.rel)) {
			
			link.slideshow_id   = link.rel.substring(10,link.rel.length-9);
			link.slideshow_type = 'previous';
			functionname	     = 'changer';		
			
		
		// slideshow_XXX_next
		} else if ( /^slideshow_[a-zA-Z0-9]+_next$/.test(link.rel)) {
			
			link.slideshow_id   = link.rel.substring(10,link.rel.length-5);
			link.slideshow_type = 'next';
			functionname	     = 'changer';		
			
		
		// slideshow_XXX_start
		} else if ( /^slideshow_[a-zA-Z0-9]+_start$/.test(link.rel)) {
			
			link.slideshow_id   = link.rel.substring(10,link.rel.length-6);
			link.slideshow_type = 'start';
			functionname	     = 'auto';		
			
		
		// slideshow_XXX_stop
		} else if ( /^slideshow_[a-zA-Z0-9]+_stop$/.test(link.rel)) {
			
			link.slideshow_id   = link.rel.substring(10,link.rel.length-5);
			link.slideshow_type = 'stop';
			functionname	     = 'auto';		
		}


		
		
		// generic stuff
		if (functionname) {
			
			if (typeof(link.onclick) != 'function'){
				eval("link.onclick = function(){ return _slideshow_"+functionname+"(this); }");
			} else {
				_slideshows[link.slideshow_id]['link_onclick_'+i] = link.onclick;
				eval("link.onclick = function(){ _slideshows['"+link.slideshow_id+"']['link_onclick_"+i+"'](); return _slideshow_"+functionname+"(this); }");
			}
			
			link.removeAttributeNode(link.getAttributeNode('rel'));
		}
	}
}


function _slideshow_changer(obj) {
	if (_slideshows[obj.slideshow_id]['fade'] && !(/mac/.test(navigator.userAgent.toLowerCase()) && /msie\s(\d+(\.?\d)*)/.test(navigator.userAgent.toLowerCase()))) {
		return _slideshow_changefade(obj);
	} else {
		return _slideshow_change(obj);
	}
}


function _slideshow_change(obj) {

	// if href or splash
	if (obj.href || obj.splash) {
	    
		// load this slideshows var
		var splash    = obj.splash;
		var id        = obj.slideshow_id;
		var type      = obj.slideshow_type;
		var slideshow = _slideshows[id];
		var img       = slideshow['images']['list'];
		var target;

		
		// if splash
		if (splash) {
			target = SLIDESHOW_SPLASH;

		// if not
		} else {

			target = slideshow['positioninarray'][obj.href];

			// change image
			// ------------------------
			if ( slideshow['images']['preload'] ) {
				slideshow['images']['object'].src = img[target].src;
			} else {
				slideshow['images']['object'].src = img[target];
			}

			
			// for each extras
			// ----------------------------------------
			for (var idextra in slideshow['extras']) {
				
				var extra = slideshow['extras'][idextra];
				
				// execute code
				if (typeof(extra['execute']) != "undefined") {

					eval(extra['execute'][target]);	

				// change attribute
				} else {

					// preloaded
					if (extra['preload']) {
						eval("extra['object']."+extra['property']+" = extra['list'][target].src;");	
					} else {
						eval("extra['object']."+extra['property']+" = extra['list'][target];");	
					}
				}
			}

		}


		
		// previous href
		// ----------------------------------------
		var previousNowrap = 0;
		var previousPosition;
		var previousHref;

		// if first 
		if (target < 1) {
			
			// if no wrap
			if (slideshow['nowrap']) {
				previousNowrap = 1;
			}

			previousPosition = img.length-1;

		} else {
			previousPosition = target - 1;
		}		
		
		// if preload
		if (slideshow['images']['preload']) {
			previousHref = img[previousPosition].src;
		} else {
			previousHref = img[previousPosition];
		}

		
		
		// next target
		// ----------------------------------------
		var nextNowrap = 0;
		var nextPosition;
		var nextHref;

		// if from splash or last
		if (target == SLIDESHOW_SPLASH || target == img.length-1) {

			// if no wrap
			if (slideshow['nowrap'] && target != SLIDESHOW_SPLASH) {
				nextNowrap = 1;
			}

			nextPosition = 0;
		
		} else {
			nextPosition = target + 1;
		}		
		
		// if preload
		if (slideshow['images']['preload']) {
			nextHref = img[nextPosition].src;
		} else {
			nextHref = img[nextPosition];
		}

		
		
		// process all previous / next
		// ----------------------------------------
		for (var i=0; i<document.getElementsByTagName('a').length; ++i) {
			var link = document.getElementsByTagName('a')[i];
			
			// previous
			if (link.slideshow_id == id && link.slideshow_type == 'previous' ) {
				
				// no wrap
				if (previousNowrap) {
					 _slideshow_removeAttributeNode(link, 'href');
				} else {
					link.href = previousHref;

					// ie mac / safari refresh patch
					if ((navigator.userAgent.toLowerCase().indexOf("mac")!=-1) && ((navigator.userAgent.toLowerCase().indexOf('msie')!=-1) || (navigator.userAgent.toLowerCase().indexOf('safari')!=-1))) {
						link.style.visibility = 'hidden';
						link.style.visibility = 'visible';
					}
				}
			
			// next
			} else if (link.slideshow_id == id && link.slideshow_type == 'next' ) {
				
				// no wrap
				if (nextNowrap) {
					 _slideshow_removeAttributeNode(link, 'href');
				} else {
					link.href = nextHref;
					
					// ie mac / safari refresh patch
					if ((navigator.userAgent.toLowerCase().indexOf("mac")!=-1) && ((navigator.userAgent.toLowerCase().indexOf('msie')!=-1) || (navigator.userAgent.toLowerCase().indexOf('safari')!=-1))) {
						link.style.visibility = 'hidden';
						link.style.visibility = 'visible';
					}
				}
			}
		}

		
		// reset position 
		_slideshows[id]['position'] = target;
	}
	
	return false;
}


function _slideshow_changefade(obj) {
	var id = obj.slideshow_id;

	window.clearInterval(_slideshows[id]['fade_interval']);
	_slideshows[id]['fade_percentage'] = 100;
	_slideshows[id]['fade_showing'] = 0;
	_slideshows[id]['fade_interval'] = window.setInterval(function() { _slideshow_fade(obj) }, 10);

	return false;
}


function _slideshow_fade(obj) {
	var id        = obj.slideshow_id;
	var slideshow = _slideshows[id];

	var percentage = (_slideshows[id]['fade_percentage'] > 0) ? _slideshows[id]['fade_percentage'] : 0;

	slideshow['images']['object'].style.filter     = 'alpha(opacity='+percentage+')';
	slideshow['images']['object'].style.opacity    = (percentage/100);
	slideshow['images']['object'].style.MozOpacity = (percentage/100);
	

	// foreach extra
	for (var idextra in slideshow['extras']) {
		
		var extra = slideshow['extras'][idextra];
		
		// if fade
		if (extra['fade']) {
			extra['object'].style.filter     = 'alpha(opacity='+percentage+')';
			extra['object'].style.opacity    = (percentage/100);
			extra['object'].style.MozOpacity = (percentage/100);
		}
	}
		
	// calc
	if (_slideshows[id]['fade_showing']) {
		if (_slideshows[id]['fade_percentage'] < 100) {
			_slideshows[id]['fade_percentage'] = _slideshows[id]['fade_percentage']+10;
		} else {
			window.clearInterval(_slideshows[id]['fade_interval']);
		}
	} else {
		if (_slideshows[id]['fade_percentage'] >= 0) {
			_slideshows[id]['fade_percentage'] = _slideshows[id]['fade_percentage']-10;
		} else {
			_slideshows[id]['fade_percentage'] = -30;
			_slideshows[id]['fade_showing'] = 1;
			
			_slideshow_change(obj);
		}
	}
	
	return false;
}


function _slideshow_auto(obj) {	
	var id = obj.slideshow_id;
	
	window.clearInterval(_slideshows[id]['auto']['interval']);
	_slideshows[id]['auto']['interval'] = false;

	if (obj.slideshow_type == 'start') {
		window.setTimeout(function() { _slideshow_doauto(obj); }, 250);
		_slideshows[id]['auto']['interval'] = window.setInterval(function() { _slideshow_doauto(obj); }, _slideshows[id]['auto']['time']);
	}

	return false;	
}



function _slideshow_doauto(obj) {	
	var id  = obj.slideshow_id;
	var img = _slideshows[id]['images']['list'];
	
	var position;
	if (_slideshows[id]['position'] == img.length-1) {
		position = 0;
	} else {
		position = _slideshows[id]['position']+1;
	}

	if (position == 0 && _slideshows[id]['nowrap']) {
		window.clearInterval(_slideshows[id]['auto']['interval']);
		_slideshows[id]['auto']['interval'] = false;
	} else {
		_slideshow_changer({
			slideshow_id:   id, 
			slideshow_type: 'next',
			href:           img[position].src
		});
	}
	
	return false;	
}



function _slideshow_preloader(code) {

	// if not ie mac	
	if (!((navigator.userAgent.toLowerCase().indexOf("mac")!=-1) && (navigator.userAgent.toLowerCase().indexOf('msie')!=-1))) {
	
		// if preload isn't completed
		if (!slideshows_preloader['completed'] ) { 
			
			// show loading only if needed
			if (slideshows_preloader['total'] !=0 && !slideshows_preloader['showed']) {
				
				eval(code['show']);

				slideshows_preloader['showed'] = 1;
			}

			// update loading
			eval(code['update']);
			
			
			// recheck 
			setTimeout(function() { _slideshow_preloader(code); },100);
		
		
		// if preload completed
		} else {
			eval(code['completed']);
		}
	
	// if ie mac	
	} else {
		eval(code['iemac']);
	}
}



function chargeVisionneuse (slideshows) {
	
	// create global var 
	_slideshows = slideshows;

	// process all links 
	_slideshow_initialLinkProcess();

	// preload 
	slideshows_preloader = new Array();
	slideshows_preloader['completed']  = 0;	
	slideshows_preloader['percentage'] = 0;
	slideshows_preloader['nbloaded']	  = 0;
	slideshows_preloader['nbtotal']	  = 0;
	


	for (var id in _slideshows) {
		
		if (id != 'preloader' && id != 'loaded') {
		   
			// init optional values
			if (typeof(_slideshows[id]['position']) == "undefined")          { _slideshows[id]['position'] = 0; }
			if (typeof(_slideshows[id]['nowrap']) == "undefined")            { _slideshows[id]['nowrap'] = 0; }
			if (typeof(_slideshows[id]['images']['preload']) == "undefined") { _slideshows[id]['images']['preload'] = 0; }
			if (typeof(_slideshows[id]['fade']) == "undefined")              { _slideshows[id]['fade'] = 0; }
			if (typeof(_slideshows[id]['auto']) == "undefined")              { _slideshows[id]['auto'] = 0; }

			// position in array
			_slideshows[id]['positioninarray'] = new Array(); 
			
			
			
			 
			for (var i=0; i<_slideshows[id]['images']['list'].length; ++i) {

				// absolute path
				_slideshows[id]['images']['list'][i] = _slideshow_buildAbsoluteLink(_slideshows[id]['images']['list'][i]);

				// position in array
				_slideshows[id]['positioninarray'][_slideshows[id]['images']['list'][i]] = i; 

				// preload
				if ( _slideshows[id]['images']['preload'] ) {
					_slideshows[id]['images']['list'][i] = _slideshow_preloadImage(_slideshows[id]['images']['list'][i]);
				}
			}


			
			 
			for (var idextra in _slideshows[id]['extras']) {
				
				// init optional value
				if (typeof(_slideshows[id]['extras'][idextra]['preload']) == "undefined") { _slideshows[id]['extras'][idextra]['preload'] = 0; }

				// preload
				if (_slideshows[id]['extras'][idextra]['preload']) {
					for (var i=0; i<_slideshows[id]['extras'][idextra]['list'].length; ++i) {
						_slideshows[id]['extras'][idextra]['list'][i] = _slideshow_preloadImage(slideshows[id]['extras'][idextra]['list'][i]);
					}
				}
			
			}
		
			
			 
			_slideshows['loaded'] = 1;
			_slideshow_preloadImage_checkComplete();

			

			 
			var starterPosition = slideshows[id]['position'];
			var starter = new Array();
			
			starter['slideshow_id']   = id;
			starter['slideshow_type'] = 'item';


			// if splash
			if (starterPosition == SLIDESHOW_SPLASH) {
				 
				starter['splash'] = 1;
			
			// if not
			} else {
				
				if ( slideshows[id]['images']['preload'] ) {
					starter['href']  = slideshows[id]['images']['list'][starterPosition].src;
				} else {
					starter['href']  = slideshows[id]['images']['list'][starterPosition];
				}
			}

			_slideshow_change(starter);
		}
	}


	// start preloader
	if (typeof(_slideshows['preloader']) != "undefined") {
		_slideshow_preloader(_slideshows['preloader']);
	}
}


 
function slideshowChangeAutoTime(id,time) {
	// change auto time
	_slideshows[id]['auto']['time'] = time;

	if (slideshowIsAutoRunning(id)) {

		// stop slideshow
		_slideshow_auto({
			slideshow_id:    id,
			slideshow_type: 'stop'
		});
		
		// start slideshow (with new time)
		_slideshow_auto({
			slideshow_id:    id,
			slideshow_type: 'start'
		});
	}
}

 
function slideshowIsAutoRunning(id) {
	return (_slideshows[id]['auto']['interval']) ? true : false;
}