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

// 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, current, last) {
	
	function placeDots(current, id){
	
	for(i = 0; i<=((elements.length)-1); i++){
			if(i != current){
			$(id).append('<img src="images/img-inactive-item-circle.gif" alt="active circle" id="circle"' + i + '"/>');
			}else{
			$(id).append('<img src="images/img-active-item-circle.gif" alt="active circle" id="circle"' + i + '"/>');
			}
			
				
		}
		
	}
	

	function updateDots(){
		
		for(i = 0; i<=(elements.length); i++){
				$("#circles > img:eq("+ current +")").attr({src: "./images/img-active-item-circle.gif" });
				$("#circles > img:eq("+ i +")").attr({src: "./images/img-inactive-item-circle.gif" });
				//alert($("#circle" + i));
				}
		
	}

	var current = 0;
	var last = -1;
	
        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);
		
		
		
		placeDots(current, '#circles');
			
			
			
        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") {
          	$("#nextBtn").attr({ href: "javascript:void(0);" });
			$("#nextBtn").click(function(){

				
			
				if(current == (elements.length -1)){
					
					current = 0;
					last = ((elements.length) -1)
					$.innerfade.next(elements, settings, current, last);
				
				} else{
					current += 1;
					last = (current -1)
					$.innerfade.next(elements, settings, current, last);
				}
				
				
				
				updateDots(current);
				
			
				
				
			 });
			
		   	$("#prevBtn").attr({ href: "javascript:void(0);" });
			$("#prevBtn").click(function(){
									
									
	
				
				if (current == 0){
					last = 0; 
					current  = ((elements.length) -1)
					$.innerfade.next(elements, settings, current, last);
				}
				else {
					current -= 1;
					last = (current +1);
					$.innerfade.next(elements, settings, current, last);
				} 
				
				updateDots(current);
								
			 });
						
     		 $(elements[current]).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") {
	
         			
        } 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\'');
       		
    	
    };

})(jQuery);





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