/*
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($j) {
$j.fn.innerfade = function(options) {
	this.each(function(){ 	
		var settings = {
			animationtype:'fade',
			speed:'normal',
			timeout:2000,
			type:'sequence',
			containerheight:'auto',
			runningclass:'innerfade'
		};
		
		if(options) {$j.extend(settings, options);}
		var elements = $j(this).children();
		if (elements.length > 1) {
			$j(this).css('position', 'relative');
			$j(this).css('height', settings.containerheight);
			$j(this).addClass(settings.runningclass);
			for ( var i = 0; i < elements.length; i++ ) {
				$j(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute');
				$j(elements[i]).hide();
			};
			if ( settings.type == 'sequence' ) {
				setTimeout(function(){
					$j.innerfade.next(elements, settings, 1, 0);
				}, settings.timeout);
				$j(elements[0]).show();
			} else if ( settings.type == 'random' ) {
				setTimeout(function(){
					do { current = Math.floor ( Math.random ( ) * ( elements.length ) ); } while ( current == 0 )
					$j.innerfade.next(elements, settings, current, 0);
				}, settings.timeout);
				$j(elements[0]).show();
			}	else {
				alert('type must either be \'sequence\' or \'random\'');
			}
		}
	});
};
$j.innerfade = function() {}
$j.innerfade.next = function (elements, settings, current, last) {
	if ( settings.animationtype == 'slide' ) {
		$j(elements[last]).slideUp(settings.speed, $j(elements[current]).slideDown(settings.speed));
	} else if ( settings.animationtype == 'fade' ) {
		$j(elements[last]).fadeOut(settings.speed);
		$j(elements[current]).fadeIn(settings.speed);
	} else {
		alert('animationtype must either be \'slide\' or \'fade\'');
	};
	if ( settings.type == 'sequence' ) {
		if ( ( current + 1 ) < elements.length ) {
			current = current + 1;
			last = current - 1;
		} else {
			current = 0;
			last = elements.length - 1;
		};
	}	else if ( settings.type == 'random' ) {
		last = current;
		while (	current == last ) {
			current = Math.floor ( Math.random ( ) * ( elements.length ) );
		};
	}	else {
		alert('type must either be \'sequence\' or \'random\'');
	};
	setTimeout((function(){$j.innerfade.next(elements, settings, current, last);}), settings.timeout);
};
})(jQuery);