// change Background-color of an object
function tg(obj, col) {
  obj.style.backgroundColor = col;
}

// restore rolled-over image
function swapImgRestore() {
  var i,x,a = document.sr;
  for(i = 0;a && i < a.length && ( x = a[i] ) && x.oSrc; i++ ) x.src = x.oSrc;
}

// preload images
function preloadImages() {
  var d = document;
  if( d.images ){
    if( !d.p ) d.p = new Array();
    var i,j = d.p.length, a = preloadImages.arguments;
    for(i = 0; i<a.length; i++ ) {
      if ( a[i].indexOf("#") != 0){
        d.p[j] = new Image;
        d.p[j++].src = a[i];
      }
    }
  }
}

// helper function
function findObj(n, d) {
  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 = findObj( n, d.layers[i].document );
  if( !x && d.getElementById ) x = d.getElementById(n);
  return x;
}

// rollover image
function swapImage() {
  var i, j = 0, x, a = swapImage.arguments;
  document.sr = new Array;
  for( i = 0; i < (a.length - 2); i += 3) {
    if( (x = findObj(a[i]) ) != null){
      document.sr[j++] = x;
      if( !x.oSrc ) x.oSrc = x.src;
      x.src = a[i+2];
    }
  }
}

//popup

function popup (url) {
 fenster=window.open(url, "_blank", "width=468,height=656,status=no,scrollbars=no,resizable=no");
 fenster.focus();
 return false;
}