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

// jquery.innerfade.js

// Datum: 2008-02-14
// Firma: Medienfreunde Hofmann & Baldes GbR
// Author: Torsten Baldes
// Updated: Vadim Kadnikov (u4n@mail.ru)
// 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,
            'timer':			0
        };
        
        if (options) {
            $.extend(settings, options);
        }
        
        if (settings.children === null) {
            var elements = $(container).children();
        } else {
            var elements = $(container).children(settings.children);
        }
        
        var switcherContainer = $(container).next().children();
        var switchers = switcherContainer.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") {
            	//TODO:: remake algorithm of this script;
            	/*$("#bannerId").hover(function() {
            		settings.timeout = 3600000;
            		clearTimeout(settings.timer);
        	    }, function() {
        	    	settings.timeout = 4000;
        	    	$.innerfade.next(elements, settings, 1, 0);
        	    });*/
            	
            	$(switchers).click(function() {
            		var currentSwitcher = $(this);
            		var i = 0;
            		
            		$(switchers).children().attr("src", "/images/index/icon_banner_not_active.png");
        			$(this).children().attr("src", "/images/index/icon_banner_active.png");
            		
            		$(switchers).each(function() {
            			if ($(this).attr("id") == currentSwitcher.attr("id")) {
            				var needShow = i;
            				
            				if (i == elements.length - 1) {
            					current = 0;
            					last = elements.length - 1;
            				} else {
            					current = i + 1;
            					last = i;
            				}
            				
            				$(elements).each(function() {
            					$(this).hide();
            				});
            				
            				$(elements[needShow]).show();
            				
            				clearTimeout(settings.timer);
            				
            				settings.timer = setTimeout(function() {
                                $.innerfade.next(elements, switchers, settings, current, last);
                            }, '15000');
            			}
            			
            			i++;
            		});
            		
            		return false;
            	});
            	
                setTimeout(function() {
                    $.innerfade.next(elements, switchers, 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, switchers, 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 ) );
				
				settings.timer = setTimeout(function(){
					$.innerfade.next(elements, switchers, 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, switchers, settings, current, last) {
        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed);
            
            $(switchers).children().attr("src", "/images/index/icon_banner_not_active.png");
            $(switchers[current]).children().attr("src", "/images/index/icon_banner_active.png");
        } else if (settings.animationtype == 'fade') {
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed, function() {
            	removeFilter($(this)[0]);
			});
            
            $(switchers).children().attr("src", "/images/index/icon_banner_not_active.png");
            $(switchers[current]).children().attr("src", "/images/index/icon_banner_active.png");
        } 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;
            }
            //console.log(current, last);
        } 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\'');
        }
        
        settings.timer = setTimeout((function() {
	        $.innerfade.next(elements, switchers, settings, current, last);
	    }), settings.timeout);
    };
})(jQuery);

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