/* =========================================================
 *
 *  <div id="imgItem"> 
 *      <p>content 1</p>
 *      <p>content 2</p>
 *      <p>content 3</p>
 *  </div>
 *  
 *  $('#imgItem').innerfade({ 
 *	  speed: Fading-/Sliding-Speed in milliseconds or keywords (slow, normal or fast) (Default: 'normal'), 
 *	  timeout: Time between the fades in milliseconds (Default: '2000'), 
 *	  children: optional children selector (Default: null)
 *  }); 
 *
// ========================================================= */


(function($) {

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

    $.innerfade = function(container, options) {
        var settings = {
        	'speed':            'normal',
            'timeout':          2000,            
            'children':         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');
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').hide();
            };
	        setTimeout(function() {
	            $.innerfade.next(elements, settings, 1, 0);
	            }, settings.timeout);
	            $(elements[0]).show();
		}
    };

    $.innerfade.next = function(elements, settings, current, last) {
        $(elements[last]).fadeOut(settings.speed);
        $(elements[current]).fadeIn(settings.speed, function() {removeFilter($(this)[0]);}); 
        if ((current + 1) < elements.length) {
            current = current + 1;
            last = current - 1;
        } else {
            current = 0;
            last = elements.length - 1;
        }
        setTimeout((function() {
            $.innerfade.next(elements, settings, current, last);
        }), settings.timeout);
    };

})(jQuery);

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