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

// jquery.innerfade.js

// Datum: 2008-02-14
// Firma: Medienfreunde Hofmann & Baldes GbR
// Author: 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/
// and Ralf S. Engelschall http://trainofthoughts.org/

 *
 *  <ul id="news">
 *      <li>content 1</li>
 *      <li>content 2</li>
 *      <li>content 3</li>
 *  </ul>
 *
 *  $('#news').innerfade({
 *	  animationtype: Type of animation 'fade' or 'slide' (Default: 'fade'),
 *	  speed: Fading-/Sliding-Speed in milliseconds or keywords (slow, normal or fast) (Default: 'normal'),
 *	  timeout: Time between the fades in milliseconds (Default: '2000'),
 *	  type: Type of slideshow: 'sequence', 'random' or 'random_start' (Default: 'sequence'),
 * 		containerheight: Height of the containing element in any css-height-value (Default: 'auto'),
 *	  runningclass: CSS-Class which the container get’s applied (Default: 'innerfade'),
 *	  children: optional children selector (Default: null)
 *  });
 *

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


(function($) {

    $.fn.innerfade = function(options) {
        return this.each(function() {
            $.innerfade(this, options);
        });
    };

    $.innerfade = function(container, options) {
        var settings = {
        	'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null,
            'controlsId':		'innerfade_controls',
        };
        if (options)
            $.extend(settings, options);
        if (settings.children === null)
            var elements = $(container).children();
        else
            var elements = $(container).children(settings.children);
        if (elements.length > 1) {
            $(container).css('position', 'relative')
				.css('height', settings.containerheight)
				.addClass(settings.runningclass);
            var controls = $('<ol id="'+settings.controlsId+'" />');
            var timeout = false;
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').hide();
                controlLink = $('<a href="#">' + (i+1) + '</a>').click(function(){
					var a = $(this).text() - 1;
					$('#' + settings.controlsId).addClass('stopped');
					var current = elements.parent().find('.current');
					var toShow = $(elements[a]);
					if(current.find('img').attr('src') == toShow.find('img').attr('src'))
						return false;
					$('#' + settings.controlsId).children('.current').removeClass('current');
					$($('#' + settings.controlsId).children()[a]).addClass('current');
					if (settings.animationtype == 'slide') {
						current.addClass('current').slideUp(settings.speed);
						toShow.addClass('current').slideDown(settings.speed);
					} else {
						current.removeClass('current').fadeOut(settings.speed);
						toShow.addClass('current').fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
					}
					if(timeout)
						clearTimeout(timeout);
					timeout = setTimeout(function(){
						current = controls.find('.current').text() - 1;
						$('#' + settings.controlsId).removeClass('stopped');
						$.innerfade.next(elements, settings, (current+1) % elements.length, current);
					}, Math.max(8000, settings.timeout * 3));
					return false;
				});
                controls.append($('<li />').append(controlLink));
            };
            $(container).parent().after(controls);
            if (settings.type == "sequence") {
                $(elements[0]).show().addClass('current');
                $(controls.children()[0]).addClass('current');
                setTimeout(function() {
                    $.innerfade.next(elements, settings, 1, 0);
                }, settings.timeout);
            } else if (settings.type == "random") {
            	var last = Math.floor ( Math.random () * ( elements.length ) );
                $(elements[last]).show().addClass('current');
                $(controls.children()[last]).addClass('current');
                setTimeout(function() {
                    do {
						current = Math.floor ( Math.random ( ) * ( elements.length ) );
					} while (last == current );
					$.innerfade.next(elements, settings, current, last);
                }, settings.timeout);
			} else if ( settings.type == 'random_start' ) {
				settings.type = 'sequence';
				var current = Math.floor ( Math.random () * ( elements.length ) );
				$(elements[current]).show().addClass('current');
				$(controls.children()[current]).addClass('current');
				setTimeout(function(){
					$.innerfade.next(elements, settings, (current + 1) %  elements.length, current);
				}, settings.timeout);
			}
		}
    };

    $.innerfade.next = function(elements, settings, current, last) {
		if($('#' + settings.controlsId).hasClass('stopped'))
			return;
		$($('#' + settings.controlsId).children()[current]).addClass('current');
		$($('#' + settings.controlsId).children().get(last)).removeClass('current');
        if (settings.animationtype == 'slide') {
            $(elements[last]).removeClass('current').slideUp(settings.speed);
            $(elements[current]).addClass('current').slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements[last]).removeClass('current').fadeOut(settings.speed);
            $(elements[current]).addClass('current').fadeIn(settings.speed, function() {
				removeFilter($(this)[0]);
			});
        }
        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);
        }
        setTimeout((function() {
            $.innerfade.next(elements, settings, current, last);
        }), settings.timeout);
    };

})(jQuery);

// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
	if(element.style.removeAttribute){
		element.style.removeAttribute('filter');
	}
}