/* Copyright Scientec Internet Applications + Media GmbH - www.scientec.de */

var curindex = 0;
var hindex = 0;
bilderg = new Array;

function init()
{
  var help = document.getElementById('galerie').getElementsByTagName('div')[0].style.backgroundImage.split(")");
  var help = help[0].split("/");
  help[2] = help[2].replace('"','');
  for(i = 0; i < bilderklein.length; i++)
  {
    if (bilderklein[i] == help[2])
    {
      curindex = i;
      bilderg[0] = bildergross[curindex];
      hindex = curindex + 1;
      if (hindex >= bilderklein.length)
      {
        hindex -= bilderklein.length;
      }
      bilderg[1] = bildergross[hindex];
      hindex = curindex + 1;
      if (hindex >= bilderklein.length)
      {
        hindex -= bilderklein.length;
      }
      bilderg[2] = bildergross[hindex];
    }
  }
  scrollimage(0);
}

function showimage(image)
{
  window.open('/bilder/'+bilderg[image],'','resizable=yes,width=520,height=420,dependent=no');
}

function scrollimage(delta)
{
  curindex = curindex - delta;
  if (curindex < 0)
  {
    curindex += bilderklein.length;
  }
  if (curindex >= bilderklein.length)
  {
    curindex -= bilderklein.length;
  }
  for(i = 0; i < 3; i++)
  {
    var hindex = curindex + i;
    if (hindex >= bilderklein.length)
    {
      hindex -= bilderklein.length;
    }
    document.getElementById('galerie').getElementsByTagName('div')[i].style.backgroundImage = "url(/bilder_klein/"+bilderklein[hindex]+")";
    bilderg[i] = bildergross[hindex];
  }
}