/* =========================================================

//jquery.innerfade.js

//Datum: 2007-01-29
//Firma: Medienfreunde Hofmann & Baldes GbR
//Autor: Torsten Baldes
//Mail: t.baldes@medienfreunde.com
//Web: http://medienfreunde.com

//based on the work of Matt Oakes http://portfolio.gizone.co.uk/applications/slideshow/

//========================================================= */

// modified by Mehmet SÖĞÜNMEZ / 07.05.2011

// added previous and next buttons (settings.nextBtn / settings.prevBtn)
// added external controls / (settings.buttons | ul > li)

//========================================================= */


(function($) {
var ifTime;
var ifCurrent = 0;
$.fn.innerfade = function(options) {

	this.each(function(){ 	
		
		var settings = {
			animationtype: 'fade',
			speed: 'normal',
			timeout: 2000,
			type: 'sequence',
			containerheight: 'auto',
			runningclass: 'innerfade',
			buttons: false,
			nextBtn: false,
			prevBtn:false
		};
		
		if(options)
			$.extend(settings, options);
		
		var elements = $(this).children();
		
		if (settings.nextBtn)
		{
			$(settings.nextBtn).click(function(){
				clearTimeout(ifTime);
				current = 0;
				
				if ( ( ifCurrent + 1 ) < elements.length ) {
					current = ifCurrent + 1;
				}
				
				$(elements[ifCurrent]).fadeOut(settings.speed);
				$.innerfade.next(elements, settings, current, ifCurrent);
			});
		}
		
		if (settings.prevBtn)
		{
			$(settings.prevBtn).click(function(){
				clearTimeout(ifTime);
				current = elements.length-1;
				
				if ( ( ifCurrent - 1 ) > -1 ) {
					current = ifCurrent - 1;
				}
				
				$(elements[ifCurrent]).fadeOut(settings.speed);
				$.innerfade.next(elements, settings, current, ifCurrent);
			});
		}
	
		if (settings.buttons)
		{
			var btns = $(settings.buttons).children();
			
			if (btns.length > 1)
			{
				$.each (btns, function(){
					$(this).hover(function(){
						if (ifCurrent != btns.index(this))
						{
							clearTimeout(ifTime);
							$(elements[ifCurrent]).fadeOut(settings.speed);
							$.innerfade.next(elements, settings, btns.index(this), ifCurrent);
						}
					}, function(){});
				});
			}
		}
		
		if (elements.length > 1) {
		
			$(this).css('position', 'relative');
	
			$(this).css('height', settings.containerheight);
			$(this).addClass(settings.runningclass);
			
			for ( var i = 0; i < elements.length; i++ ) {
				$(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute');
				$(elements[i]).hide();
			};
		
			if ( settings.type == 'sequence' ) {
				ifTime = setTimeout(function(){
					$.innerfade.next(elements, settings, 1, 0);
				}, settings.timeout);
				$(elements[0]).show();
			} else if ( settings.type == 'random' ) {
				ifTime = setTimeout(function(){
					do { current = Math.floor ( Math.random ( ) * ( elements.length ) ); } while ( current == 0 )
					$.innerfade.next(elements, settings, current, 0);
				}, settings.timeout);
				$(elements[0]).show();
			}	else {
				alert('type must either be \'sequence\' or \'random\'');
			}
			
		}
		
	});
};


$.innerfade = function() {}
$.innerfade.next = function (elements, settings, current, last) {
	
	var btns = $(settings.buttons).children();
	$(btns).find('a').removeClass('cur');
	$(btns[current]).find('a').addClass('cur');
	
	if ( settings.animationtype == 'slide' ) {
		$(elements[last]).slideUp(settings.speed, $(elements[current]).slideDown(settings.speed));
	} else if ( settings.animationtype == 'fade' ) {
		$(elements[last]).fadeOut(settings.speed);
		$(elements[current]).fadeIn(settings.speed);
	} else {
		alert('animationtype must either be \'slide\' or \'fade\'');
	};
	
	if ( settings.type == 'sequence' ) {
		if ( ( current + 1 ) < elements.length ) {
			current = current + 1;
			last = current - 1;
		} else {
			current = 0;
			last = elements.length - 1;
		};
	}	else if ( settings.type == 'random' ) {
		last = current;
		while (	current == last ) {
			current = Math.floor ( Math.random ( ) * ( elements.length ) );
		};
	}	else {
		alert('type must either be \'sequence\' or \'random\'');
	};
	
	ifCurrent = last;
	ifTime = setTimeout((function(){$.innerfade.next(elements, settings, current, last);}), settings.timeout);
};
})(jQuery);