/****************************************************************
"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
*****************************************************************/
//*****parameters to set*****
//into this array insert the paths of your pics.
var def_imges=new Array ('divSource1', 'divSource2', 'divSource3', 'divSource4', 'divSource5', 'divSource6', 'divSource7');
var def_sdur=3; //time to show a pic between fades in seconds
var def_fdur=1; //duration of the complete fade in seconds
var def_steps=20; //steps to fade from on pic to the next
var def_startwhen="y"; //start automatically at pageload? set it to "y" for on and to "n" for off
var def_shuffle="y"; //start with random image? set it to "y" for on and to "n" for off

//****************************************************************

//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(be_slideid,be_imges,be_sdur,be_fdur,be_steps,be_startwhen,be_shuffle){

//declarations and defaults
	var slideid=(be_slideid)?be_slideid:"0";
	var imges=(be_imges)?be_imges:def_imges;
	var sdur=(be_sdur)?be_sdur:def_sdur;
	var fdur=(be_fdur)?be_fdur:def_fdur;
	var steps=(be_steps)?be_steps:def_steps;
	var startwhen=(be_startwhen)?be_startwhen:def_startwhen;
			startwhen=(startwhen.toLowerCase()=="y")?1:0;
	var shuffle=(be_shuffle)?be_shuffle:def_shuffle;
			shuffle=(shuffle.toLowerCase()=="y")?1:0;
	
	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;
	
	//check if there are at least 3 pictures, elswhere double the array
	if(imges.length<=2){imges=imges.concat(imges);}

	//shuffle images if set
  	if(shuffle)
	{

		var i;
		for(i=0;i<=Math.floor(Math.random()*imges.length);i++)
		{
			imges.push(imges.shift());
		}
	}
  

	//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){
				ptofade.style.visibility="hidden";
				ptofade.style.zIndex=1;
				pnext.style.zIndex=2;
				startim=startim+1;u=0;
				mytimeout=setTimeout(function(){self.b_slide();},stim);
			}
			else{
				ptofade.style.visibility="hidden";
				ptofade.style.zIndex=1;
				pnext.style.zIndex=2;
				startim=1;u=0;
				mytimeout=setTimeout(function(){self.b_slide();},stim);
			}
		}
	}




//insert css and images
	this.b_insert= function(){
		
		var a,idakt,paktidakt,ie5exep;
		for(a=1;a<=emax;a++){
		paktidakt=document.getElementById(imges[a-1]);
    	ie5exep=new Array(paktidakt);parr=parr.concat(ie5exep);
if(paktidakt.style.visibility == "visible")
{
	startim = a;
}

    }
		if(startwhen){
			stopit=0;
 			mytimeout=setTimeout(function(){self.b_slide();},stim);
 		}
	}

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

var be_0= new be_slideshow();