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

// 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_title;
    		var curr_slide_id_number;
    		var next_slide_id_number;
        return this.each(function() {   
            $.innerfade(this, options);
        });
    };
	
	//set options button click event
    jQuery.setOptionsButtonEvent = function()
    {
	
	$("#"+settings.slide_nav_id+" li").each(function() {
                // add click functionality to buttons
                
                $(this).click(function() {
                	
                	//$("#"+settings.pause_button_id+" span").html("play");
                	//$("#"+settings.pause_button_id).attr("class", "paused_button");
                    button_class = $(this).attr("class");
                    split_button_class_string = button_class.split("_");
                    button_class_string   = split_button_class_string.pop();
                    curr_slide_id_number  = parseFloat(button_class_string);
                    next_slide_id_number  = curr_slide_id_number - 1;
                    //settings.slide_timer_on = 'no'
                  	$.skip();
   
                }); // click
            }); //each
    
	}

    $.innerfade = function(container, options) {
		
        var settings = {
        		'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null,
			 'slide_ui_parent':	null,
			 'slide_ui_text':	null,
			'slide_nav_id':		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);
            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") {
                setTimeout(function() {
                    $.innerfade.next(elements, settings, 1, 0);
                }, settings.timeout);
                $(elements[0]).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\'');
						}
					if(settings.slide_nav_id != 'null')
                {
                	$("#"+settings.slide_nav_id+" li").removeAttr("id");
            		$("#"+settings.slide_nav_id+" .slide_0").attr("id", "button_selected");
            	}
				}
    };
	
    $.skip = function() {
    	
    			
				var elements = $("ul#"+settings.slide_ui_parent+" li");

				for (var i = 0; i < elements.length; i++) 
				{
					if (settings.animationtype == 'fade')
					{
    					$(elements[i]).fadeOut(settings.speed);

    				}
    				else
    				{
						$(elements[i]).slideUp(settings.speed);

					}
    				
    			}
    			if (settings.animationtype == 'fade')
				{
            		$(elements[curr_slide_id_number]).fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});

				}
				else
				{
					$(elements[curr_slide_id_number]).slideDown(settings.speed, function() {
							removeFilter($(this)[0]);
						});

					
				}
				if(settings.slide_nav_id != 'null')
				{
					$("#"+settings.slide_nav_id+" li").removeAttr("id");
            		$("#"+settings.slide_nav_id+" .slide_"+curr_slide_id_number).attr("id", "button_selected");
            	}
						
            
            } //skip	

    $.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\'');
        setTimeout((function() {
            $.innerfade.next(elements, settings, current, last);
        }), settings.timeout);
		
		if(settings.slide_nav_id != 'null')
				{
					$("#"+settings.slide_nav_id+" li").removeAttr("id");
            		$("#"+settings.slide_nav_id+" .slide_"+current).attr("id", "button_selected");
            	}
    };

})(jQuery);

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