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

// 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
        }
        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();
            }
            
            if (settings.type == "sequence") {
                setTimeout(function() {
                    $.innerfade.next(elements, settings, 1, 0);
                }, settings.timeout);
                
                current_caption = ($(elements[0]).children(".caption:first").length ? $(elements[0]).children(".caption:first") : false) 
                $(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);
                $(elements[last]).show();
                current_caption = ($(elements[last]).children(".caption:first").length ? $(elements[last]).children(".caption:first") : false) 
			
			} 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);
					$(elements[current]).show();
					current_caption = ($(elements[current]).children(".caption:first").length ? $(elements[current]).children(".caption:first") : false) 
					
			} 
			
			else {
				// alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
			}
			
			if(current_caption){current_caption.animate({"top": "-50px"}, 1000);}
			
		}
			
    }

    $.innerfade.next = function(elements, settings, current, last) {

        if($(elements[last]).children(".caption:first").length){
        	$(elements[last]).children(".caption:first").animate({"top": "0"}, 500);
        }

        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($(elements[current]).children(".caption:first").length){ 
			$(elements[current]).children(".caption:first").animate({"top": "-50px"}, 1000);
		}


        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');
	}
}