var img_anz=;var act_img=0;var bid=0;
var tout="";
var play=0;
var top_img="a";
var bot_img="b";
var first=true;

function next_img() {
  bid=act_img+1;
  if(bid>img_anz)
     bid=1;
  display_img(bid);
  return '';
}
function prev_img() {
  bid=act_img-1;
  if(bid<1)
     bid=img_anz;
  display_img(bid);
  return '';
}
function goto_img(id) {
  window.clearTimeout(tout);
  play=0;
  display_img(id);
  var info=window.document.getElementById('T');
  info.innerHTML='Diashow gestoppt';
  return '';
}
function display_img(id) {
  (top_img=="a")?(new_img="b"):(new_img="a");
  var a=document.getElementById('img_'+new_img);
  setOpacity(0,a);
  if(b[id]) {
     a.innerHTML='<img src="'+b[id]+'" alt="" onload="javascript:go_rotation();" title="auf Bild klicken zum Schlie&szlig;en"  onClick="window.close();">';
  }
  fade_out(top_img);
  fade_in(new_img);
  act_img=id;
  create_index();
  var tmp=top_img;
  top_img=new_img;
  new_img=tmp;
  var tmp="";
}

function go_rotation() {
  var info=window.document.getElementById('T');
  var a=document.getElementById('bttns');
  if(play==1) {
    info.innerHTML='Diashow läuft';
    tout=window.setTimeout("next_img()",4000);
    a.innerHTML='<a class="ivl" href="#" onfocus="if(this.blur)this.blur();" onclick="javascript:stop_rotation();">Diashow stoppen</a>';
  } else {
    a.innerHTML='<a class="ivl" href="#" onfocus="if(this.blur)this.blur();" onclick="javascript:start_rotation();">Diashow starten</a>';
  }
  return '';
}

function start_rotation() {
  play=1;
  go_rotation();
  return '';
}
function stop_rotation() {
  var info=window.document.getElementById('T');
  play=0;
  go_rotation();
  info.innerHTML='Diashow gestoppt';
  window.clearInterval(tout);
  return '';
}
function create_index() {
  var a=document.getElementById('ausw');
  var l=document.getElementById('left');
  var r=document.getElementById('right');
  a.innerHTML="";
  for(i=1;i < b.length;i++) {
    if(i==act_img) {
      a.innerHTML+='<a style="color:white;">'+i+'</a> ';
    } else {
      a.innerHTML+='<a onclick="javascript:goto_img('+i+');" href="#">'+i+'</a> ';
    }
  }
  if(act_img==1) {
     l.innerHTML="";
  } else {
     l.innerHTML='<a onFocus="if(this.blur)this.blur();" href="#" onclick="javascript:goto_img(act_img-1)">Vorheriges Bild</a>';
  }
  if(act_img==b.length-1) {
     r.innerHTML="";
  } else {
     r.innerHTML='<a onFocus="if(this.blur)this.blur();" href="#" onclick="javascript:goto_img(act_img+1)">N&auml;chstes Bild</a>';
  }
  return '';
}
var op_a=0;
var op_b=0;
var stufe=14;
var fa="";
var fb="";
function fade_out(a) {
  if(a=="a") {
   op_a=100;
   window.clearInterval(fa);
   fa=window.setInterval('fade_out_act("'+a+'");',100);
  } else {
   op_b=100;
   window.clearInterval(fb);
   fb=window.setInterval('fade_out_act("'+a+'");',100);
  }
  return'';
}
function fade_out_act(a) {
  var fo=document.getElementById('img_'+a);
  if(a=="a") {
    var op=op_a;
  } else {
    var op=op_b;
  }
  if(op>0) {
     op-=stufe;
  } else {
     op=0;
     if(a=="a") {
      window.clearInterval(fa);
     } else {               
      window.clearInterval(fb);
     }
  }
  if(a=="a") {
    op_a=op;
  } else {
    op_b=op;
  }
  setOpacity(op,fo);
}
function fade_in(a) {
  if(a=="a") {
   op_a=0;
   window.clearInterval(fa);
   fa=window.setInterval('fade_in_act("'+a+'");',100);
  } else {
   op_b=0;
   window.clearInterval(fb);
   fb=window.setInterval('fade_in_act("'+a+'");',100);
  }
  return'';
}
function fade_in_act(a) {
  var fi=document.getElementById('img_'+a);
  if(a=="a") {
    var op=op_a;
  } else {
    var op=op_b;
  }
  if(op<100) {
     op+=stufe;
  } else {
     op=100;
     if(a=="a") {
      window.clearInterval(fa);
     } else {
      window.clearInterval(fb);
     }
  }
  if(a=="a") {
    op_a=op;
  } else {
    op_b=op;
  }
  setOpacity(op,fi);
}
function setOpacity(value,Obj) {
  Obj.style.opacity = value/100;
  Obj.style.filter = 'alpha(opacity=' + value + ')';
}