/* ===
// jquery.innerfade.js
// Datum: 2007-01-29
// 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/
// === */

(function($) {

$.fn.innerfade = function(options) {

this.each(function(){

	var settings = {
	animationtype: 'fade',
	speed: 'normal',
	timeout: 2000,
	type: 'sequence',
	containerheight: 'auto',
	runningclass: 'innerfade'
	};

if(options)
	$.extend(settings, options);

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

	if (elements.length > 1) {
	$(this).css('position', 'relative');

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

	for ( var i = 0; i < elements.length; i++ ) {
	$(elements[i]).css('z-index', String(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) {

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);
	} else {
	alert('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('type must either be \'sequence\' or \'random\'');
	};
	setTimeout((function(){$.innerfade.next(elements, settings, current, last);}), settings.timeout);
};
})(jQuery);