// =========================================================

// jq-innerfade.js

// Datum: 2006-09-01

// Firma: Medienfreunde Hofmann & Baldes GbR

// Autor: 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/

// =========================================================

$.fn.innerfade = function(options) {

	return this.each(function(){

		var settings = {

			speed: 'normal',

			timeout: 2000,

			type: 'sequence',

			containerheight: 'auto'

		}

		//Stop IE flicker

		if ($.browser.msie == true) {

			document.execCommand('BackgroundImageCache', false, true);

		}

		//Stop IE flicker

		if(options)

			$.extend(settings, options);

		var elements = $(this).children().get();

		if (elements.length > 1) {

			$(this).parent().css('position', 'relative');

			$(this).css('height', settings.containerheight);

			for ( var i = 0; i < elements.length; i++ ) {

				$(elements[i]).css('z-index', elements.length - i).css('position', 'absolute');

				$(elements[i]).hide();

			}	

			if ( settings.type == 'sequence' ) {

				setTimeout(function(){

					$.innerfade.next(elements, settings, 1, 0);

				}, settings.timeout);

				$(elements[0]).show();

			}

			else if ( settings.type == 'random' ) {

				setTimeout(function(){

					do { current = Math.floor ( Math.random ( ) * ( elements.length ) ); } while ( current == 0 )

					$.innerfade.next(elements, settings, current, 0);

				}, settings.timeout);

				$(elements[0]).show();

			}

			else {

				alert('type must either be \'sequence\' or \'random\'');

			}

		}

	});

};

$.innerfade = function() {}

$.innerfade.next = function (elements, settings, current, last) {

	$(elements[last]).fadeOut(settings.speed);

	$(elements[current]).fadeIn(settings.speed);

	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('type must either be \'sequence\' or \'random\'');

	}

	setTimeout((function(){$.innerfade.next(elements, settings, current, last);}), settings.timeout);

}