var picture_galleries = new Array();
var interval = null;
var fading = false;

function startSlideshow( gallery_id ) {
	if (interval) {
		window.clearInterval( interval );
		interval = null;
		$('gallery_'+gallery_id+'_btn_start').innerHTML = 'Slideshow starten';
	} else {
		interval = window.setInterval('galleryNext(\''+gallery_id+'\', true)', 5000);
		window.setTimeout("galleryNext( '"+gallery_id+"', true);", 2000);

		$('gallery_'+gallery_id+'_btn_start').innerHTML = 'Slideshow stoppen';
	}
}

function galleryNext( gallery_id, automatic ) {

	if (fading) return;
	
	gallery_id = parseInt(gallery_id);
	
	if (interval && !automatic) {
		window.clearInterval( interval );
		interval = null;
		$('gallery_'+gallery_id+'_btn_start').innerHTML = 'Slideshow starten';
	}
	
	var all_pics = $('gallery_'+gallery_id+'_pic_container').childElements();

	picture_galleries[gallery_id].current_pic++;
	if (automatic) {
		if ( (picture_galleries[gallery_id].current_pic) > picture_galleries[gallery_id].total_pics ) {
			picture_galleries[gallery_id].current_pic = 1;
			$('gallery_'+gallery_id+'_btn_prev').hide();
			$('gallery_'+gallery_id+'_btn_next').show();
			var pic_current_ref = all_pics[picture_galleries[gallery_id].total_pics-1];
			var pic_to_load_ref = all_pics[picture_galleries[gallery_id].current_pic-1];
		} else {
			var pic_current_ref = all_pics[picture_galleries[gallery_id].current_pic-2];
			var pic_to_load_ref = all_pics[picture_galleries[gallery_id].current_pic-1];
		}
	} else {
		if ( (picture_galleries[gallery_id].current_pic) > picture_galleries[gallery_id].total_pics ) {
			picture_galleries[gallery_id].current_pic--;
			return;
		}
		var pic_current_ref = all_pics[picture_galleries[gallery_id].current_pic-2];
		var pic_to_load_ref = all_pics[picture_galleries[gallery_id].current_pic-1];
	}

	// Check if next picture was already loaded, else wait until it is
	if (!pic_to_load_ref.down('img').loaded) {
		$('gallery_'+gallery_id+'_indicator').show();
		window.setTimeout('galleryNext(\''+gallery_id+'\')',100);
		return;
	}

	$('gallery_'+gallery_id+'_indicator').hide();
	
	pic_to_load_ref.setOpacity(0);
	pic_to_load_ref.setStyle({visibility:'visible'});
	
	$('gallery_'+gallery_id+'_pagecounter').innerHTML = picture_galleries[gallery_id].current_pic;
	
	if (picture_galleries[gallery_id].current_pic!=1) {
		$('gallery_'+gallery_id+'_btn_prev').show();
	}
	
	if (picture_galleries[gallery_id].current_pic==picture_galleries[gallery_id].total_pics) {
		$('gallery_'+gallery_id+'_btn_next').hide();
	}
	
	crossFade( pic_current_ref, pic_to_load_ref, .5 );

}

function galleryPrevious( gallery_id ) {
	
	if (fading) return;
	
	if (interval) {
		window.clearInterval( interval );
		interval = null;
	}

	var all_pics = $('gallery_'+gallery_id+'_pic_container').childElements();
	
	if ( (picture_galleries[gallery_id].current_pic-1) < 1 )
		return;
		
	picture_galleries[gallery_id].current_pic--;
	$('gallery_'+gallery_id+'_pagecounter').innerHTML = picture_galleries[gallery_id].current_pic;
	
	$('gallery_'+gallery_id+'_btn_next').show();
	
	if (picture_galleries[gallery_id].current_pic==1) {
		$('gallery_'+gallery_id+'_btn_prev').hide();
	}
	
	var pic_current_ref = all_pics[picture_galleries[gallery_id].current_pic];
	var pic_to_load_ref = all_pics[picture_galleries[gallery_id].current_pic-1];

	crossFade( pic_current_ref, pic_to_load_ref, .5 );
	
}

function crossFade( current_element, next_element, duration ) {
	
	if (!duration) duration = 1;
	
	fading = true;
	
	Effect.Fade( current_element, { duration:duration, from:1.0, to:0.0 } );
	Effect.Appear( next_element, { duration:duration, from:0.0, to:1.0, afterFinish:function(){fading=false;} } );
	
}

function flash_detection(required, max)	{
	var required_version = required;
	var max_version = max;
	var available_version = 0;

	if(typeof(navigator.plugins["Shockwave Flash"]) == "object") {
		var description = navigator.plugins["Shockwave Flash"].description;
		available_version = description.substr(16, (description.indexOf(".", 16) - 16));
	} else if(typeof(ActiveXObject) == "function") {
		for(var i = 2; i < (max_version + 1); i ++) {
			try {
                if(typeof(new ActiveXObject("ShockwaveFlash.ShockwaveFlash." + i)) == "object") {
                   available_version = i;
                }
           }
           catch(error)
           {
           }
        }
    }

    return [available_version, required_version];
}

function writeFlash ( swf, fallback, width, height, wmode) {
	var flashver = flash_detection(6, 20);

	if (flashver[0] >= 7) {	
	//if (flashver[0] >= 20) {	
		document.write(
				'<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="'+width+'" height="'+height+'">' +
         			'<param name="movie" value="'+swf+'" />' +
         			'<param name="bgcolor" value="#ffffff" />' +
         			'<param name="quality" value="high" />');
         			if (!wmode) {
                 	document.write('<param name="wmode" value="transparent" />');    
              }
   document.write('<embed id="flash" src="'+swf+'" bgcolor="#ffffff" quality="high" ');
            if (!wmode) {
              document.write('wmode="transparent"');
            } 
            document.write(' pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="'+width+'" height="'+height+'"></embed>' +
  				'</object>'
			);
	} else {
		document.getElementById('video_player').style.display = 'none';
		//document.getElementById(fallback).style.display = 'block';
	} 

}