/****************************************************************
"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 ('element1.PNG', 'element2.PNG', 'element3.PNG', 'element4.PNG', 'element5.PNG', 'element6.PNG');
var def_divid="slideshow"; //the id of the div container that will hold the slideshow
var def_picwid=200; //set this to the width of your widest pic
var def_pichei=200; //... and this to the height of your highest pic
var def_backgr="#eeeeee"; //set this to the background color you want to use for the slide-area
//(for example the body-background-color) if your pics are of different size
var def_sdur=6; //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="n"; //start with random image? set it to "y" for on and to "n" for off
var def_showcontr="y"; //do you want to show controls? set it to "y" for on and to "n" for off
//into this array insert the paths of your control-buttons or the text to display e.g. back,start,stop,fwrd.
var def_contr=new Array ('bwd.png', 'start.png', 'stop.png', 'fwd.png');
//****************************************************************

//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_divid,be_picwid,be_pichei,be_backgr,be_sdur,be_fdur,be_steps,be_startwhen,be_shuffle,be_showcontr,be_contr){

//declarations and defaults
  var slideid=(be_slideid)?be_slideid:"0";
  var imges=(be_imges)?be_imges:def_imges;
  var divid=(be_divid)?be_divid:def_divid;
  var picwid=(be_picwid)?be_picwid:def_picwid;
  var pichei=(be_pichei)?be_pichei:def_pichei;
  var backgr=(be_backgr)?be_backgr:def_backgr;
  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 showcontr=(be_showcontr)?be_showcontr:def_showcontr;
      showcontr=(showcontr.toLowerCase()=="n")?1:0;
  var contr=(be_contr)?be_contr:def_contr;
  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());}}
  
//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();
    }
  }

//one step forward
  this.b_forw = function(){
    stopit=1;
    clearTimeout(mytimeout);
    ptofade=parr[startim-1];
    if(startim<emax){pnext=parr[startim];startim=startim+1;}
    else{pnext=parr[0];startim=1;}
    ptofade.style.visibility="hidden";
    ptofade.style.zIndex=1;
    pnext.style.visibility="visible";
    pnext.style.zIndex=2;
    self.b_slide();
  }

//one step back
  this.b_back = function(){
    stopit=1;
    clearTimeout(mytimeout);
    if(u==0){ //between two slides
      ptofade=parr[startim-1];
      if(startim<emax){pnext=parr[startim];}
      else{pnext=parr[0];}
      pnext.style.visibility="hidden";
      ptofade.style.zIndex=1;
      ptofade.style.visibility="visible";
      if(startim>=2){startim=startim-1;}
      else{startim=emax;}
      self.b_slide();
    }
    else{ //whilst sliding
      self.b_slide();
    }
  }

//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);
      }
    }
  }

//manual start
  this.b_start= function(){
    if(stopit==1){
      stopit=0;
      mytimeout=setTimeout(function(){self.b_slide();},stim);
    }
  }

//manual stop
  this.b_stop= function(){
    clearTimeout(mytimeout);
    stopit=1;
    this.b_slide();
  }

//insert css and images
  this.b_insert= function(){
    var b, thestylid, thez, thevis, slidehei;
    slidehei=(showcontr)?(pichei+25):(pichei); //add space for the controls
    var myhtml="<div style='width:"+picwid+"px;height:"+slidehei+"px;'>";
        myhtml+="<div style='position:absolute;width:"+picwid+"px;height:"+pichei+"px;'>";
    for(b=1;b<=emax;b++){
      thez=1;thevis='hidden';
      if(b<=1) {thez=2; thevis='visible';}
        myhtml+="<div id='img_"+slideid+"_"+b+"' style='font-size:0;line-height:"+pichei+"px;margin:0;padding:0;text-align:center;visibility:"+thevis+";z-index:"+thez+";position:absolute;left:0;top:0;width:"+picwid+"px;height:"+pichei+"px;background-color:"+backgr+";'>";
        myhtml+="<img src='"+imges[(b-1)]+"' style='vertical-align:middle;border:0;' alt=''/></div>";
    }
        myhtml+="</div>";
//show controls
    if(showcontr){
        for(b=1;b<=4;b++){
          var check=contr[b-1].substring(contr[b-1].length-3).toLowerCase(); //check for buttons
          contr[b-1]=(check=="jpg"||check=="gif"||check=="png")?("<img src='"+contr[b-1]+"' style='border:none;' alt=''/>"):(contr[b-1]);
        }
        myhtml+="<div style='display:block;width:"+picwid+"px;padding-top:"+(pichei+3)+"px;text-align:right;'>";
        myhtml+="<a href='javascript:be_"+slideid+".b_back();' style='text-decoration:none'>"+contr[0]+"</a>&nbsp;";
        myhtml+="<a href='javascript:be_"+slideid+".b_start();' style='text-decoration:none'>"+contr[1]+"</a>&nbsp;";
        myhtml+="<a href='javascript:be_"+slideid+".b_stop();' style='text-decoration:none'>"+contr[2]+"</a>&nbsp;";
        myhtml+="<a href='javascript:be_"+slideid+".b_forw();' style='text-decoration:none'>"+contr[3]+"</a>";
    }
        myhtml+="</div>";
    document.getElementById(divid).innerHTML=myhtml;
    self.b_myfade();
  }

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

var be_0= new be_slideshow();