/* ############################################
Slideshow Functions


	Damit alles richtig funktioniert, müssen die 
	folgenden Zeilen in init.js hinzugefügt werden:
	(Zwischen "Behaviour.addLoadEvent (function(){"  und "}")
	
		// Slideshow
		if (window['$slideshow']!=undefined)
		{	//Load config
			if (window['$slideconfig']!=undefined)
			{	config=window['$slideconfig'];
				
			}	else {config=new Array();}
			startShow();
		}


*/
//Galerie Globals
var config;
var slideSwap;
var currentSlide;
var start;
var next;
var slides;
var reverse=0;

function slideBack()
{	clearTimeout(slideSwap);
	
	reverse=1;
	slideSwap=setTimeout("slider("+currentSlide+")",0);
	
	config['stop']="yes";
	document.getElementById('slidePlayPause').className="stop";
}

function slidePlayPause()
{	if (config['stop']!="yes")
	{	config['stop']="yes";
		clearTimeout(slideSwap);
		document.getElementById('slidePlayPause').className="play";
	}
	else
	{	config['stop']="no";
		slideSwap=setTimeout("slider("+currentSlide+")",0);
		document.getElementById('slidePlayPause').className="stop";
	}
	
}	
	
function slideNext()
{	clearTimeout(slideSwap);
	currentSlide=currentSlide++;
	slideSwap=setTimeout("slider("+currentSlide+")",0);
	config['stop']="yes";
	document.getElementById('slidePlayPause').className="play";
}	
	
function Left(STRING,CHARACTER_COUNT){
return STRING.substring(0,CHARACTER_COUNT);
}


//Opacity
// http://www.brainerror.net/scripts_js_blendtrans.php
function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}
//change the opacity for different browsers

function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

function slider()
{	var args = slider.arguments;
	

	//If the first iteration, set up the variables
	if (args.length==0)
	{	start=0;
	}
	else
	{	//Future iteration
		start=args[0];
	}
	//If only one image
	if ($slideshow.length==0)
	{	return true;
	}	

	if (reverse==1)
	{	start=currentSlide;
		if (currentSlide==0)
		{	next=slides-1;
		}
		else
		{	next=currentSlide-1;
		}
	}
	else
	{	next=start+1;
	}
	
	//On the last image, restart
	if ((start==($slideshow.length-1)) && (reverse!=1))
	{	next=0;
	}

	if (reverse==1)
	{	reverse=0;
	}
	
	opacity('slide'+start,100,0,$speed);
	opacity('slide'+next,0,100,$speed);
	
	currentSlide=next;
	
	document.getElementById('slide'+start).style.zIndex=80;
	document.getElementById('slide'+next).style.zIndex=81;
	
	if (config['text']!="no")
	{	document.getElementById('desc'+start).style.display="none";
		document.getElementById('desc'+next).style.display="block";
		
		
		
		document.getElementById('desc'+start).style.zIndex=80;
		document.getElementById('desc'+start).style.position="absolute";
		document.getElementById('desc'+next).style.zIndex=81;
			
	}
	
	if (config['stop']!="yes")
	{	slideSwap=setTimeout("slider("+next+")",$delay);
	}
}






function startShow()
{	if (document.getElementById('slideshow'))
	{	
		var slideshow=document.getElementById('slideshow');
	
		slideshow.style.position="relative";
		slideshow.innerHTML="";
		
		$counter=0;
		
		slides=$slideshow.length;
		
		
		for (var i=0;i<$slideshow.length;i++)
		{	var slide=document.createElement("DIV");
			slide.setAttribute('id','slide'+i);
			slide.className="slide";
			slide.style.position="absolute";
			slide.style.overflow="visible";
			
							
			if (i>0)
			{	slide.style.display="none";
			}
			
			var div=document.createElement("DIV");
			div.className="bildContainer";
			
			var imgLink=document.createElement("A");
			
			if (config['text']!="no")
			{	var desc=document.createElement("P");
				desc.setAttribute('id','desc'+i);
				desc.innerHTML=Left($beschreibung[i],70);
				desc.style.className="slidedesc";
				desc.style.position="absolute";
			}
			if (($link[i]!="") && ($link[i]!=undefined))
			{	
				imgLink.setAttribute('href',$link[i]);
				if (config['text']!="no")
				{	desc.innerHTML='<a href="'+$link[i]+'">'+desc.innerHTML+'</a>';
				}
			}
			else
			{	imgLink.setAttribute('href','javascript:;');
			}
			
			var img=document.createElement("IMG");
			img.src=$path+"/"+$slideshow[i];
			
			if (img.width=="0")	
			{	setTimeout(	function()
							{	img.style.marginTop=(($boxheight-img.height)/2)+"px";
								img.style.marginLeft=(($boxwidth-img.width)/2)+"px";						
							},2000);
			}
			else
			{	img.style.marginTop=(($boxheight-img.height)/2)+"px";
				img.style.marginLeft=(($boxwidth-img.width)/2)+"px";
			}
			
			
			
			imgLink.appendChild(img);
					
			
			div.appendChild(imgLink);		
			slide.appendChild(div);
			if (config['text']!="no")
			{	slideshow.appendChild(desc);
				
			}
			
			slideshow.appendChild(slide);
			
			document.getElementById('slide0').style.zIndex=100;
			if (config['text']!="no")
			{	document.getElementById('desc0').style.zIndex=81;
			}
				
			if (i>0)
			{	changeOpac(0,'slide'+i);
				document.getElementById('slide'+i).style.display="block";
			}
			
		} //eoFor
		
		if (config['navi']=="yes")
		{	var controls=document.createElement("SPAN");
			controls.id="controls";
			controls.style.display="block";
			var back=document.createElement("A");
			back.id="slideBack";
			back.href="javascript:slideBack();";
			back.innerHTML="&lt;";
			back.title = "vorheriges Bild";
			
			var playpause=document.createElement("A");
			playpause.id="slidePlayPause";
			playpause.href="javascript:slidePlayPause();";
			if (config['stop']!="yes")
			{	playpause.className="stop";
				playpause.title="Pause"
			}
			else
			{	playpause.className="play";
				playpause.title="Play"
			}
			playpause.innerHTML="x";
			
			var next=document.createElement("A");
			next.id="slideNext";
			next.href="javascript:slideNext();";
			next.innerHTML="&gt;";
			next.title="n"+unescape("%E4")+"chstes Bild";
			
			controls.appendChild(back);
			controls.appendChild(playpause);
			controls.appendChild(next);
			slideshow.appendChild(controls);
		}
		
		start=0;
		
		currentSlide=0;
		if (config['stop']!="yes")
		{	slideSwap=setTimeout("slider()",$delay);
		}
		
		
		
	}
}