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

// 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);
                $(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();
						} 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();
						}	else {
							alert('innerfade-type must either be \'sequence\', \'random\' or \'random_start\'');
						}
				}
    };

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