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

// 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)
 *  }); 
 *

// ========================================================= */
jQuery.fn.extend({				 
	innerfade: function(options) {
		$.ifs = {
			'settings': '',
			'elements': '',
			'currentImage': '',
			'last': '',
			'timeout': '',
			'paused':'false'
		};
		settings = {
			'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null
        };

		if (options) $.extend(settings, options);
        if (settings.children === null) {
            elements = $(this).children();
		} else {
            elements = $(this).children(settings.children);
		}

		if (elements.length > 1) {
            $(this).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)).hide();
            };
			
            if (settings.type == "sequence") {
				currentImage = 0;
				last = 1;
                $.ifs.timeout = setTimeout(function() {
                    $(this).nextIF();
                }, 0);
                $(elements[0]).show();
			} else if ( settings.type == 'random_start' ) {
				settings.type = 'sequence';
				currentImage = Math.floor ( Math.random () * ( elements.length ) );
				currentImage = (currentImage + 1) %  elements.length;
				last = elements.length;
				$.ifs.timeout = setTimeout(function(){
					$(this).nextIF();
				}, 0);
				$(elements[currentImage]).show();
			} else {
				alert('Innerfade-Type must either be \'sequence\' or \'random_start\'');
			}
		
		// Set Globals
		$.ifs.elements = elements;
		$.ifs.settings = settings;
		$.ifs.currentImage = currentImage;
		$.ifs.last = last;
		}
	},
	
	nextIF: function() {
		if ($.ifs.paused == 'false') {
			// Set Vars From Global
			elements = $.ifs.elements;
			settings = $.ifs.settings;
			currentImage = $.ifs.currentImage;
			last = $.ifs.last;
	
			// Animate the Groups
			$(elements[last]).fadeOut(settings.speed);
			$(elements[currentImage]).fadeIn(settings.speed, function() {
				removeFilter($(this)[0]);
			});
	
			if (settings.type == "sequence") {
				if ((currentImage + 1) < elements.length) {
					currentImage = currentImage + 1;
					last = currentImage - 1;
				} else {
					currentImage = 0;
					last = elements.length - 1;
				}
			} else {
				alert('Innerfade-Type must either be \'sequence\' or \'random_start\'');
			}
			$.ifs.timeout = setTimeout((function() {
			   $(this).nextIF();
			}), settings.timeout);
			
			// Set Globals
			$.ifs.elements = elements;
			$.ifs.settings = settings;
			$.ifs.currentImage = currentImage;
			$.ifs.last = last;
		}
	},
	
	pauseSS: function(bo) {
		$.ifs.paused = bo;
		if ($.ifs.paused == 'false') {
			clearTimeout($.ifs.timeout);
			$(this).nextIF();
		}
	},

	gotoInnerfade: function(goto) {
		if ($.ifs.last == goto) {
			// Do Nothing
		} else {
			$.ifs.currentImage = goto;
			clearTimeout($.ifs.timeout);
			$(this).nextIF();
		}
	}
});

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