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

// 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);