/// -----------------------------------------------------------------------------
var slshTimeOut = 100; // delay between two fade steps
var slshDelay = 2500;  // how long a image is shown before the next is faded in
var slshDelta = 3;    // how much the opacity is modified per step(in percent)

// ------------------------------------------------------------ GLOBAL VARIABLES
// -----------------------------------------------------------------------------
var slshStartOpacity = 0;
var slshCurOpacity = slshStartOpacity;
var slshCurImage = 0;

// ----------------------------------------------------------- PRIVATE FUNCTIONS
// -----------------------------------------------------------------------------
// sets the opacity of layer2
function slshSetOpacity(opacity)
{
  var layer2 = document.getElementById('slshLayer2');
  if(layer2 != null) {
    var layer2style = layer2.style;
    layer2style.opacity = (opacity / 100);
    layer2style.MozOpacity = (opacity / 100);
    layer2style.KhtmlOpacity = (opacity / 100);
    layer2style.filter = "alpha(opacity=" + opacity + ")";
  }
  slshCurOpacity = opacity;
}

// sets the href-property of the link
// url - url to set
function slshSetLink(url) {
  var slshLink = document.getElementById('slshLink');
  if(slshLink != null) slshLink.href = url;
}

// sets the background-image of a div
// div - div
// url - url of the image
function slshSetImage(div, url) {
  if(div != null) {
    div.style.backgroundImage = "URL('" + url + "')";
  }
}

// ------------------------------------------------------------ PUBLIC FUNCTIONS
// -----------------------------------------------------------------------------
// initializes the script
function slshInit(randomize) {
  slshSetOpacity(slshStartOpacity);
  if(randomize) slshCurImage = Math.round(Math.random()*(slshImages.length -1));
  slshSetLink(slshUrls[slshCurImage]);
  slshSetImage(document.getElementById('slshLayer1'), slshImages[slshCurImage]);
  slshSetImage(document.getElementById('slshLayer2'), slshImages[slshCurImage]);
  window.setTimeout("slshTick()", slshDelay);
}

// event handler for the timer
function slshTick() {
  var layer2 = document.getElementById('slshLayer2');

  slshSetOpacity(slshCurOpacity + slshDelta);
  if(slshCurOpacity >= 100) {
    var layer1 = document.getElementById('slshLayer1');
    slshSetImage(layer1, slshImages[slshCurImage]);
    slshSetLink(slshUrls[slshCurImage]);

    slshCurImage = (slshCurImage + 1) % slshImages.length;

    slshSetOpacity(slshStartOpacity);
    slshSetImage(layer2, slshImages[slshCurImage]);

    window.setTimeout("slshTick()", slshDelay);
  } else {
    window.setTimeout("slshTick()", slshTimeOut);
  }
}
function open_impressum()
        {
                var w = 850;
                var h = 740;
                var posx = 0;
                var posy = 0;
                var n=window.open('templates/impressum.html','danny','toolbar=no,status=no,location=no,directories=no,menubar=no,scrollbars=yes,resizable=yes,width=' +w+ ',height=' +h+',left='+posx+',top='+posy);
        }
        function open_impressum2()
        {
                var w = 850;
                var h = 740;
                var posx = 0;
                var posy = 0;
                var n=window.open('impressum.html','danny','toolbar=no,status=no,location=no,directories=no,menubar=no,scrollbars=yes,resizable=yes,width=' +w+ ',height=' +h+',left='+posx+',top='+posy);
        }