function grafic_big(url,id){
  document.getElementById('grafikdiv').style.visibility = 'visible'; 

  loadImageObj = new Image();
  loadImageObj.onload = function () {
  /* nachdem das loading.gif geladen wurde, das Overlay anzeigen */
  imageObj = new Image();
  imageObj.onload = function () {    
    if(imageObj.width >= screen.width) {
      var scalewidth = imageObj.width / 1.55;
      var scaleheight = imageObj.height / 1.55;
      document.getElementById('grafikdivimg').innerHTML = '<img src=\"' + imageObj.src +'\" width=\"' +  scalewidth + '\" height=\"' +  scaleheight + '\" alt=\"\">';  
    }
    else {
      document.getElementById('grafikdivimg').innerHTML = '<img src=\"' + imageObj.src +'\" alt=\"\">';  
    }
  };
  imageObj.src = url;
  };
  loadImageObj.src = 'loadgrafic.gif';
}

function close_grafic_div() {
  document.getElementById('grafikdiv').style.visibility = 'hidden';    
  document.getElementById('grafikdivimg').innerHTML = '<img src=\"loadgrafic.gif\" width=\"25\" height=\"25\" alt=\"\">';
}

function openaadiv(id,lang,hgt) {
  if (document.getElementById(id).style.visibility == 'collapse') {
    if (lang == 1) {
      document.getElementById('regelnde').style.visibility = 'collapse';
      document.getElementById('regelnde').style.height = '0px';
      document.getElementById('regelnen').style.height = hgt + 'px';
    }
    if (lang == 0) {
      document.getElementById('regelnen').style.visibility = 'collapse';
      document.getElementById('regelnen').style.height = '0px';
      document.getElementById('regelnde').style.height = hgt + 'px';
    }

    return document.getElementById(id).style.visibility = 'visible';
  }
}

function nw_hover(id,src) {
  document.getElementById(id).src = 'header/' + src + '_hover.png';
}

function nw_hout (id,src) {
  document.getElementById(id).src = 'header/' + src + '.png';
}