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

"bretteleben.de JavaScript Slideshow" - Version 20090301

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: 2009-03-01

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

//*****parameters to set*****

//into this array insert the paths of your pics.




var def_divid="slideshow"; //the id of the div container that will hold the slideshow

var def_picwid=300; //set this to the width of your widest pic

var def_pichei=225; //... and this to the height of your highest pic

var def_backgr="#FFFFFF"; //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=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

var def_showcontr="n"; //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()=="y")?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){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:top;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();