/****************************************************************
"bretteleben.de JavaScript Slideshow" - Version 20090406
License: http://www.gnu.org/copyleft/gpl.html
Author: Andreas Berger
Copyright (c) 2009 Andreas Berger - andreas_berger@bretteleben.de
Project page and Demo at http://www.bretteleben.de
Last update: 2009-04-06
*****************************************************************/


//daisychain onload-events
function daisychain(sl){if(window.onload) {var ld=window.onload;window.onload=function(){ld();sl();};}else{window.onload=function(){sl();};}}

function be_slideshow (){

//declarations and defaults
	var slideid="0";
	var imges=images;
	var divid="frame";
	
	var picwid=546;
	var pichei=366;
	var sdur=3;			//time to show a pic between fades in seconds
	var fdur=3;			//duration of the complete fade in seconds
	var steps=30;		//steps to fade from on pic to the next
	var startwhen=1;	//start automatically at pageload?
	var shuffle=1;		//start with random image?

	var ftim=fdur*1000/steps;
	var stim=sdur*1000;
	var emax=imges.length;
	var self = this;
	var stopit=1;
	var startim=1;
	var u=0;
	var parr = new Array();
	var ptofade,pnext,factor,mytimeout;
	
	var IE = document.all;

	if (IE) {
		picwid += 10;
		pichei += 11;
	}
	
//shuffle images if set
  if(shuffle){var i;for(i=0;i<=Math.floor(Math.random()*imges.length);i++){imges.push(imges.shift());}}
  
//push images into array and get things going
	this.b_myfade = function(){
		var a,idakt,paktidakt,ie5exep;
		for(a=1;a<=emax;a++){
			idakt="img_"+slideid+"_"+a;paktidakt=document.getElementById(idakt);
    		ie5exep=new Array(paktidakt);parr=parr.concat(ie5exep);
   		}
		if(startwhen){
			stopit=0;
 			mytimeout=setTimeout(function(){self.b_slide();},stim);
 		}
	}

//prepare current and next and trigger slide
	this.b_slide = function(){
		clearTimeout(mytimeout);
		u=0;
		ptofade=parr[startim-1];
		if(startim<emax){pnext=parr[startim];}
		else{pnext=parr[0];}
		pnext.style.zIndex=1;
		pnext.style.visibility="visible";
		pnext.style.filter="Alpha(Opacity=100)";
		pnext.style.MozOpacity=1;
		pnext.style.opacity=1;
		ptofade.style.zIndex=2;
		ptofade.style.visibility="visible";
		ptofade.style.filter="Alpha(Opacity=100)";
		ptofade.style.MozOpacity=1;
		ptofade.style.opacity=1;
		factor=100/steps;
		if(stopit=="0"){
			this.b_slidenow();
		}
	}

//slide as said, then give back
	this.b_slidenow = function(){
		var check1,maxalpha,curralpha;
		check1=ptofade.style.MozOpacity;
		maxalpha=(100-factor*u)/100*105;
		if(check1<=maxalpha/100){u=u+1;}
		curralpha=100-factor*u;
		ptofade.style.filter="Alpha(Opacity="+curralpha+")";
		ptofade.style.MozOpacity=curralpha/100;
		ptofade.style.opacity=curralpha/100;
		if(u<steps){ //slide not finished
			if(stopit=="0"){mytimeout=setTimeout(function(){self.b_slidenow();},ftim);}
			else {this.b_slide();}
		}
		else{ //slide finished
			if(startim>=emax){
				startim=0;
			}
			ptofade.style.visibility="hidden";
			ptofade.style.zIndex=1;
			pnext.style.zIndex=2;
			startim=startim+1;u=0;
			mytimeout=setTimeout(function(){self.b_slide();},stim);
			
		}
	}

//insert css and images
	this.b_insert= function(){
		var b, thestylid, thez, thevis;

		var myhtml="<div style='width:"+picwid+"px;height:"+pichei+"px;'>";
   			myhtml+="<div style='position:absolute;width:"+picwid+"px;height:"+pichei+"px;'>";
   		myhtml = "";
		for(b=1;b<=emax;b++){
			thez=1;thevis='hidden';
			if(b<=1) {thez=2; thevis='visible';}
			  myhtml+="<div id='img_"+slideid+"_"+b+"' style='visibility:"+thevis+";z-index:"+thez+";position:absolute;left:0;top:0;width:"+picwid+"px;height:"+pichei+"px;'>";
				myhtml+="<img src='"+imges[(b-1)]+"' alt=''/></div>";
		}
		document.getElementById(divid).innerHTML=myhtml;
		self.b_myfade();
	
	}

//call autostart-function
daisychain(this.b_insert);
	
}

var be_0= new be_slideshow();