/* =========================================================
 // 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': 10000,
            'containerheight': 'auto',
            'runningclass': 'innerfade',
            'children': null
            */
        };
		var href = new Array();
        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);
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length - i)).css('position', 'absolute').hide();
				$(elements[i]).attr('links', $(elements[i]).find('a').attr('href'));
            };
            if (settings.type == "sequence") {
                setTimeout(function(){
                    $.innerfade.next(elements, settings, 1, 0);
                }, settings.timeout);
				$('a.btn_readnews').attr('href', $(elements[0]).attr('links'));
                $(elements[0]).show();
            }
            else 
                if (settings.type == "random") {
                    var last = Math.floor(Math.random() * (elements.length));
                    setTimeout(function(){
                        do {
                            current = Math.floor(Math.random() * (elements.length));
                        }
                        while (last == current);
                        $.innerfade.next(elements, settings, current, last);
                    }, settings.timeout);
					$('a.btn_readnews').attr('href', $(elements[last]).attr('links'));
                    $(elements[last]).show();
                }
                else 
                    if (settings.type == 'random_start') {
                        settings.type = 'sequence';
                        var current = Math.floor(Math.random() * (elements.length));
                        setTimeout(function(){
                            $.innerfade.next(elements, settings, (current + 1) % elements.length, current);
                        }, settings.timeout);
						$('a.btn_readnews').attr('href', $(elements[current]).attr('links')); 
                        $(elements[current]).show();
                    }
                    else {
                        alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
                    }
        }
   	};
	
    $.innerfade.next = function(elements, settings, current, last){
		$('a.btn_readnews').attr('href', $(elements[current]).attr('links'));
        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed);
        }
        else 
            if (settings.animationtype == 'fade') {
                $(elements[last]).fadeOut(settings.speed);
                $(elements[current]).fadeIn(settings.speed, function(){
                    removeFilter($(this)[0]);
                });
            }
            else 
                alert('Innerfade-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('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
        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');
    }
}