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

// 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) {
		var elements = new Array();
		var settings = new Object();
		var doAnim = true;
		var timeoutObject;
		return this.each(function() {
			$.innerfade(this, options);
		});
	};

	$.fn.innerfade.next = function( current, last ) {
		$.innerfade.doAnim = false;
		clearTimeout( $.innerfade.timeoutObject );
		$.innerfade.next( current, last, true );
	}

	$.innerfade = function(container, options) {
		$.innerfade.settings = {
			'animationtype':    'fade',
			'speed':            'normal',
			'type':             'sequence',
			'timeout':          2000,
			'containerheight':  'auto',
			'runningclass':     'innerfade',
			'children':         null,
			'onchange': 		null
		};
		if (options)
			$.extend($.innerfade.settings, options);
			
		$.innerfade.doAnim = true;
		$.innerfade.timeoutObject = new Object();
			
		if ($.innerfade.settings.children === null)
			$.innerfade.elements = $(container).children();
		else
			$.innerfade.elements = $(container).children($.innerfade.settings.children);
			
		if ($.innerfade.elements.length > 1) {
			$(container).css('position', 'relative').css('height', $.innerfade.settings.containerheight).addClass($.innerfade.settings.runningclass);
			for (var i = 0; i < $.innerfade.elements.length; i++) {
				$($.innerfade.elements[i]).css('z-index', String($.innerfade.elements.length-i)).css('position', 'absolute').hide();
			};
			if ($.innerfade.settings.type == "sequence") {
				if ( $.innerfade.doAnim ) {
					$.innerfade.timeoutObject = setTimeout(function() {
						$.innerfade.next(1,0);
					}, $.innerfade.settings.timeout);
					$($.innerfade.elements[0]).show();
				}
			} else if ($.innerfade.settings.type == "random") {
				if ( $.innerfade.doAnim ) {
					last = Math.floor ( Math.random () * ( $.innerfade.elements.length ) );
					$.innerfade.timeoutObject = setTimeout(function() {
						do {
							current = Math.floor ( Math.random ( ) * ( $.innerfade.elements.length ) );
						} while (last == current );
						$.innerfade.next(current, last);
					}, $.innerfade.settings.timeout);
					$($.innerfade.elements[last]).show();
				}
			} else if ( $.innerfade.settings.type == 'random_start' ) {
				if ( $.innerfade.doAnim ) {
					$.innerfade.settings.type = 'sequence';
					current = Math.floor ( Math.random () * ( $.innerfade.elements.length ) );
					$.innerfade.timeoutObject = setTimeout(function(){
						$.innerfade.next((current + 1) %  $.innerfade.elements.length, current);
					}, $.innerfade.settings.timeout);
					$($.innerfade.elements[current]).show();
				}
			} else {
				alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
			}
		}
	};

	$.innerfade.next = function(current, last, auto) {
		if ($.innerfade.settings.animationtype == 'slide') {
			$($.innerfade.elements[last]).slideUp($.innerfade.settings.speed);
			$($.innerfade.elements[current]).slideDown($.innerfade.settings.speed);
		} else if ($.innerfade.settings.animationtype == 'fade') {
			$($.innerfade.elements[last]).fadeOut($.innerfade.settings.speed);
			$($.innerfade.elements[current]).fadeIn($.innerfade.settings.speed, function() {
				removeFilter($(this)[0]);
			});
		} else {
			alert('Innerfade-animationtype must either be \'slide\' or \'fade\'');
		}
		if ( $.innerfade.settings.onchange != null ) {
			$.innerfade.settings.onchange( current, last );
		}
		if ( !auto ) {
			if ($.innerfade.settings.type == "sequence") {
				if ((current + 1) < $.innerfade.elements.length) {
					current = current + 1;
					last = current - 1;
				} else {
					current = 0;
					last = $.innerfade.elements.length - 1;
				}
			} else if ($.innerfade.settings.type == "random") {
				last = current;
				while (current == last) {
					current = Math.floor(Math.random() * $.innerfade.elements.length);
				}
			} else {
				alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
			}
		}
		if ( $.innerfade.doAnim ) {
			$.innerfade.timeoutObject = setTimeout((function() {
				$.innerfade.next(current, last);
			}), $.innerfade.settings.timeout);
		}
	};

})(jQuery);

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