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

// 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',
 'containerminheight':  0,
 'runningclass':     'innerfade',
 'pauseOnHover':     true,
 '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);
	 $(container).css('min-height', settings.containerminheight);
	 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") {
		_cycle = function() { $.innerfade.next(elements, settings, 1, 0); };
		 _timer = setTimeout(_cycle, settings.timeout);
		 $(elements[0]).show();
	 } else if (settings.type == "random") {
		 var last = Math.floor ( Math.random () * ( elements.length ) );
		_cycle = function() {
                                 do {
                                 current = Math.floor ( Math.random ( ) * ( elements.length ) );
                                 } while (last == current );
                                 $.innerfade.next(elements, settings, current, last);
                                 };
		 _timer = setTimeout(_cycle, settings.timeout);
		 $(elements[last]).show();
	 } else if ( settings.type == 'random_start' ) {
		 settings.type = 'sequence';
		 var current = Math.floor ( Math.random () * ( elements.length ) );
		 _cycle = function(){ $.innerfade.next(elements, settings, (current + 1) %  elements.length, current); };
		 _timer = setTimeout(_cycle, settings.timeout);
		 $(elements[current]).show();
	 } else
		 alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
	if (settings.pauseOnHover) {
		$(container).bind({
				'mouseenter': function() {
				$(container).addClass('jquery-innerfade-paused');
				clearTimeout(_timer);
				},
				'mouseleave': function() {
				$(container).removeClass('jquery-innerfade-paused');
				_timer=setTimeout(_cycle,settings.wait);
				}
			});
	}
 }
 };

 $.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\'');
	 _timer = 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');
	}
}