/****************************************************************
"bretteleben.de JavaScript Slideshow" - Version 20100412
License: http://www.gnu.org/copyleft/gpl.html
Author: Andreas Berger
Copyright (c) 2010 Andreas Berger - andreas_berger@bretteleben.de
Project page and Demo at http://www.bretteleben.de
Last update: 2012-02-29 (modified by P. Osiak - http://www.vetmed.fu-berlin.de/einrichtungen/zentrale/bibliothek)
*****************************************************************/
//*****parameters to set*****
//into this array insert the paths of your pics.
var def_imges=['http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we07/we07_01.jpg',
			   'http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we07/we07_02.jpg',
			   'http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we07/we07_03.jpg'];

var def_captions=['',
'',
'Das Robert-von-Ostertag-Haus, künftiges Institutsgebäude'];
			   
var def_captions_en=['',
'',
''];
var def_divid="slideshow"; //the id of the div container that will hold the slideshow
var def_picwid=240; //set this to the width of your widest pic
var def_pichei=180; //... and this to the height of your highest pic
var def_contrbackgr="#99CC00"; // background color of the control panel
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=0.5; //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=['http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we03/bwd.png', 'http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we03/start.png', 'http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we03/stop.png', 'http://www.vetmed.fu-berlin.de/einrichtungen/weprofil/we03/fwd.png'];
//****************************************************************

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

function be_slideshow(be_en,be_slideid,be_imges,be_captions,be_divid,be_picwid,be_pichei,be_contrbackgr,be_backgr,be_sdur,be_fdur,be_steps,be_startwhen,be_shuffle,be_showcontr,be_contr){

//declarations and defaults
	var en=(be_en)?be_en:"false";
	var slideid=(be_slideid)?be_slideid:"0";
	var imges=(be_imges)?be_imges:def_imges;
	if (en == true) {
		var captions=(be_captions)?be_captions:def_captions_en;
	} else {
		var captions=(be_captions)?be_captions:def_captions;
	}
	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 contrbackgr=(be_contrbackgr)?be_contrbackgr:def_contrbackgr;
	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){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)";
		try{pnext.style.removeAttribute("filter");} catch(err){}
		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();
		}
	}
	
//prepare current and previous and trigger slide
	this.b_slideback = function(){
		clearTimeout(mytimeout);
		u=0;
		ptofade=parr[startim-1];
		if(startim==1){pprev=parr[emax-1];}
		else{pprev=parr[startim-2];}
		pprev.style.zIndex=1;
		pprev.style.visibility="visible";
		pprev.style.filter="Alpha(Opacity=100)";
		try{pprev.style.removeAttribute("filter");} catch(err){}
		pprev.style.MozOpacity=1;
		pprev.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(){
		document.getElementById("startbtn").style.display = 'inline';
		document.getElementById("stopbtn").style.display = 'none';
		stopit=1;
		clearTimeout(mytimeout);
		self.b_slide();
		
		ptofade=parr[startim-1];
			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);
			}
	}

//one step back
	this.b_back = function(){
		var pprev;
		document.getElementById("startbtn").style.display = 'inline';
		document.getElementById("stopbtn").style.display = 'none';
		stopit=1;
		clearTimeout(mytimeout);
		if(u==0){ //between two slides
			
			self.b_slideback();
			
			ptofade=parr[startim-1];
			if(startim==1){
				pprev = parr[emax-1];
				ptofade.style.visibility="hidden";
				ptofade.style.zIndex=1;
				pprev.style.zIndex=2;
				pprev.style.visibility="visible";
				startim=emax;u=0;
				mytimeout=setTimeout(function(){self.b_slide();},stim);
			}
			else{
				pprev = parr[startim-2];
				ptofade.style.visibility="hidden";
				ptofade.style.zIndex=1;
				pprev.style.zIndex=2;
				pprev.style.visibility="visible";
				startim=startim-1;u=0;
				mytimeout=setTimeout(function(){self.b_slide();},stim);
			}
		}
		else{ //whilst sliding
			self.b_slideback();
		}
	}

//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);
			document.getElementById("startbtn").style.display = 'none';
			document.getElementById("stopbtn").style.display = 'inline';
 		}
	}

//manual stop
	this.b_stop= function(){
		clearTimeout(mytimeout);
		stopit=1;
		if(u > 0){this.b_slide();ptofade.style.zIndex=1;pnext.style.zIndex=2;startim++;}
		document.getElementById("startbtn").style.display = 'inline';
		document.getElementById("stopbtn").style.display = 'none';
	}

//insert css and images
	this.b_insert= function(){
		var b, thestylid, thez, thevis, slidehei;
		slidehei=(showcontr)?(pichei+26):(pichei); //add space for the controls
		var myhtml="<div style='position:absolute;width:"+picwid+"px;height:"+slidehei+"px;background-color:"+contrbackgr+";'>";
   			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='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;width:"+picwid+"px;' alt=''/>";
				myhtml += "<div style='position:absolute;bottom:0;left:0;display:block;opacity:0.45;width:"+(picwid)+"px;height:40px;text-align:left;background-color:black;filter:alpha(opacity=45);'></div>";
				myhtml += "<div style='color:white;position:absolute;bottom:0;left:0;display:block;width:"+(picwid-32)+"px;height:26px;text-align:left;padding-left:16px;padding-right:16px;padding-top:7px;padding-bottom:7px'><p style='color: white;'>"+captions[(b-1)]+"</p></div>";
				myhtml += "<div style='line-height:26px;padding:0;height:26px;position:absolute;bottom:-26px;right:90px;display:block;'><p>"+b+"/"+emax+"</p></div>";
				myhtml += "</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='position:absolute;bottom:0;display:block;width:"+(picwid-16)+"px;padding-left:8px;padding-right:8px;'>";
			if(en == true) {
				myhtml+="<div style='float:left;'><strong>IMPRESSIONS</strong></div>";
			} else {
				myhtml+="<div style='float:left;'><strong>IMPRESSIONEN</strong></div>";
			}
			myhtml+="<div style='float:right;background-color:"+contrbackgr+";'>";
			myhtml+="<a href='javascript:be_"+slideid+".b_back();' style='text-decoration:none'>"+contr[0]+"</a>&nbsp;";
			myhtml+="<a href='javascript:be_"+slideid+".b_forw();' style='text-decoration:none'>"+contr[3]+"</a>&nbsp;";
   			myhtml+="<a id='startbtn' href='javascript:be_"+slideid+".b_start();' style='display:none;text-decoration:none'>"+contr[1]+"&nbsp;</a>";
   			myhtml+="<a id='stopbtn' href='javascript:be_"+slideid+".b_stop();' style='text-decoration:none'>"+contr[2]+"&nbsp;</a>";
			myhtml+="</div>";

		}
   			myhtml+="</div>";
		document.getElementById(divid).innerHTML=myhtml;
		self.b_myfade();
	}

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

// Ueberpruefen ob in dem Script-Text "en" enthalten ist, falls ja, englische Version ausgeben
var scripts = document.getElementsByTagName('script');
var myScript = scripts[scripts.length - 1];

if (myScript.innerHTML.indexOf("en") != -1) {
	var be_0= new be_slideshow(true);
} else {
	var be_0= new be_slideshow();
}