/* 

*/

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


function getName(s) {
var d = s.lastIndexOf('.');
return s.substring(s.lastIndexOf('/') + 1, d < 0 ? s.length : d);
}

function CurrentImage() {
  // alert('CurrentImage = ' + document.getElementById('ausstellung').style.background );
  
  var intImage = getName( document.getElementById('ausstellung').style.background );
  
  // alert('intImage = ' + intImage );

  if (intImage == '')
  {
  intImage = 1;
  }
   
  // alert('parseInt(intImage) = ' + parseInt( intImage, 10 ) );
  return parseInt ( intImage, 10 );
}

function CurrentImageX(elem) {
  var intImage = getName( document.getElementById(elem).style.background );

  if (intImage == '')
  {
  intImage = 1;
  }
   
  return parseInt ( intImage, 10 );
}

function pad(number,length) {
    var str = '' + number;
    while (str.length < length)
        str = '0' + str;
    return str;
}

function SetNewBackground(c)
{
  //document.getElementById('ausstellung').style.background='url(bilder/ausstellung/' + pad(c, 2) + '.jpg)';
  // alert(document.getElementById('ausstellung').style.background);
  SetNewBackgroundX(c, 'ausstellung', 'bilder/ausstellung/');
}

function SetNewBackgroundX(c, elem, spath)
{
  document.getElementById(elem).style.background= 'url(' + spath + pad(c, 2) + '.jpg)';
  return false;
}

function NextImage()
{
  var c = CurrentImage();
  // alert ('c = ' + c);
  
  if (c == 25) 
  {
    c = 1;
  }
  else
  {
  //alert ('c vor plus = ' + c);
    c++;
  //alert ('c nach plus = ' + c);
  }

  SetNewBackground(c); 
}

function NextImageX(max, elem, spath)
{
  var c = CurrentImageX(elem);
  
  if (c == max) 
  {
    c = 1;
  }
  else
  {
    c++;
  }

  SetNewBackgroundX(c, elem, spath); 
}


function PreviousImage()
{
  var c = parseInt(CurrentImage());
  
  if (c == parseInt(1)) 
  {
    c = 25;
  }
  else
  {
    // alert ('c vor minus = ' + c);
    c = c - 1;
    //alert ('c nach minus = ' + c);
  }
  
  SetNewBackground(c); 
}

function PreviousImageX(max, elem, spath)
{
  var c = parseInt(CurrentImageX(elem));
  
  if (c == parseInt(1)) 
  {
    c = max;
  }
  else
  {
    c = c - 1;
  }
  
  SetNewBackgroundX(c, elem, spath); 
}