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

// jquery.innerfade.js

// *** Edited by Phil Exler, to make work with numbered navigation ***

// 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) {
        var settings = {
        	'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null,
			'start':			-1
        };
        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();
            };
			var startVal = 0;
			var nextVal = 1;
			if(settings.start > -1) {
				startVal = settings.start - 1;
				nextVal = startVal + 1;
				if(nextVal == elements.length) {
					nextVal = 0;
				}
			//startVal = 2;
			//nextVal = 3;
			}
            if (settings.type == "sequence") {
				navTimeout = setTimeout(function() {
                    $.innerfade.next(elements, settings, nextVal, startVal);
                }, settings.timeout);
				$.innerfade.navChangeSelected(startVal, -1);
	               $(elements[startVal]).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) {
		$.innerfade.navChangeSelected(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\'');
		}
		navTimeout2 = setTimeout((function() {
			$.innerfade.next(elements, settings, current, last);
		}), settings.timeout);
    };
	
	$.innerfade.navChangeSelected = function(current, last) {
		var childs = $('#subNavItems').children();
		if($(childs[current]) != undefined){
			var currentchilds = $(childs[current]).children();
			$(currentchilds[0]).addClass('selected');
		}
		if($(childs[last]) != undefined){
			var lastchilds = $(childs[last]).children();
			$(lastchilds[0]).removeClass('selected');
		}
	};
	
	$.innerfade.navChange = function(current, last) {
	}

})(jQuery);

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

var navTimeout = null;
var navTimeout2 = null;

function navChange(index) {
	clearTimeout(navTimeout);
	clearTimeout(navTimeout2);
	navTimeout = null;
	navTimeout2 = null;
	$('#subNavItems li a').removeClass('selected');
	$('#mainContent').innerfade({
		animationtype: 'fade',
		speed: 1000,
		timeout: 8000,
		type: 'sequence',
		containerheight: '1em',
		start: index
	});
}