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

// 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)
 *  }); 
 *

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

var manualClick = false;
(function($) {

    $.fn.innerfade = function(options) {
        //debugger;
        return this.each(function() {   
            $.innerfade(this, options);
        });
    };

    $.innerfade = function(container, options) {
		//alert($(container).children().html());
        //debugger;
        var settings = {
        	'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null,
            'currentIndex':     0,
            'lastIndex':        0      
        };
        if (options)
            $.extend(settings, options);
        if (settings.children === null)
            var elements = $(container).children();
        else
            var elements = $(container).children(settings.children);
        
        // tuannh 2011.11.01
        if (elements.length < 2){
            $('.' + settings.prevClass).hide();
            $('.' + settings.nextClass).hide();
        }    
        // end commment
            
        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(); 				
            };
            
            // tuannh 2011.11.01
            $('.' + settings.prevClass).click(function(){  
                if (settings.currentIndex-1 < 0){
                    settings.currentIndex = elements.length - 1;
                    settings.lastIndex = 0;
                }
                else{
                    settings.lastIndex = settings.currentIndex;
                    settings.currentIndex--;                    
                }
                
                manualClick = true;
                $.innerfade.customPrev(elements, settings, settings.currentIndex, settings.lastIndex);
            })
            
            $('.' + settings.nextClass).click(function(){
                if (settings.currentIndex + 1 < elements.length){
                    settings.lastIndex = settings.currentIndex;
                    settings.currentIndex++;
                }                    
                else{
                    settings.currentIndex = 0;
                    settings.lastIndex = elements.length - 1;
                } 
                
                manualClick = true;
                $.innerfade.customNext(elements, settings, settings.currentIndex, settings.lastIndex);
            })
            // end comment
            
            if (settings.type == "sequence") {
                settings.currentIndex = 0;
                settings.lastIndex = 0;
                
                setTimeout(function() {
                    $.innerfade.next(elements, settings);					
                }, settings.timeout);
                $(elements[0]).show();
            }   
        }
    };
    
    // tuannh 2011.11.01
    $.innerfade.getCurrentIndex = function(elements){
        for (var i = 0; i < elements.length; i++)
        {
            if ($(elements[i]).css('display') == 'block')
                return i;
        }
        return 0;
    }    

    $.innerfade.next = function(elements, settings) {    
        
        if (manualClick)
        {
            setTimeout("manualClick = false", settings.timeout);
            setTimeout((function() {
                    $.innerfade.next(elements, settings);
            }), settings.timeout);   
            return;
        }
           
         if (settings.type == "sequence") {		
			if ((settings.currentIndex + 1) < elements.length) {
				settings.currentIndex++;
				settings.lastIndex = settings.currentIndex - 1;
			} else {
				settings.currentIndex = 0;
				settings.lastIndex = elements.length - 1;
			}
        }    
    
        if (settings.animationtype == 'slide') {
            $(elements[settings.lastIndex]).slideUp(settings.speed);
            $(elements[settings.currentIndex]).slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements[settings.lastIndex]).fadeOut(settings.speed);
            $(elements[settings.currentIndex]).fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
        }        
       
        
        setTimeout((function() {
                $.innerfade.next(elements, settings);
        }), settings.timeout);         
    };
    
    // tuannh
    $.innerfade.customNext = function(elements, settings) {
        if (settings.animationtype == 'slide') {
            $(elements[settings.lastIndex]).slideUp(settings.speed);
            $(elements[settings.currentIndex]).slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements[settings.lastIndex]).fadeOut(settings.speed);
            $(elements[settings.currentIndex]).fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
        } 
    };

	/*Nga*/
	$.innerfade.customPrev = function(elements, settings, current, last) {  	  
	     if (settings.animationtype == 'slide') {
            $(elements[settings.lastIndex]).slideUp(settings.speed);
            $(elements[settings.currentIndex]).slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements[settings.lastIndex]).fadeOut(settings.speed);
            $(elements[settings.currentIndex]).fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
        } 
    };


})(jQuery);

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