function openProduct(url, windowname, width, height) {
    option = 'resizable,scrollbars=yes,menubar,locationbar=no,width='+width+',height='+height;
    popupWin = window.open(url, windowname, option)
    popupWin.focus();
}


// Ein und Ausblenden
function toggledisplay (id){
  if (document.getElementById) {
    var mydiv = document.getElementById(id);
    // alert(mydiv.style.display);
    mydiv.style.display = (mydiv.style.display=='block'?'none':'block');
  }
}



// Layer Einblenden
function showlayer (layer_id, main_id){
  if (document.getElementById) {
    var layerdiv = document.getElementById(layer_id);
    var maindiv = document.getElementById(main_id);
    // alert(mydiv.style.display);
    layerdiv.style.display = (layerdiv.style.display=='block'?'none':'block');
    maindiv.style.display = (maindiv.style.display=='block'?'none':'block');
  }
}