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

// 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,
            'changed':			function(){}
        };
        
        if (options)
            $.extend(settings, options);
        
        var elements = settings.children === null ? 
        	$(container).children() : 
        	$(container).children(settings.children); 
        
        if (elements.length > 1) 
        {
        	if($(container).css('position') != 'absolute')
            	$(container).css('position', 'relative');
            
        	$(container)
        		.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();
        	
        	switch(settings.type)
        	{
        		case "sequence":
        			setTimeout(function(){
                        $.innerfade.next(elements, settings, 1, 0);
                    }, settings.timeout);
                    $(elements[0]).show();
                    break;
                    
        		case "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();
                    break;
                    
        		case "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();
					break;
					
				default:
					alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
        	}
        	
        	settings.changed.apply(elements[0]);
        }
    };

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

})(jQuery);

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