function conf(question)
{
  if(!confirm(question))
  {
    return false;
  }
}

function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages(imgFolder) {
  if (document.images) {
    topHomeHover = newImage(imgFolder + "/header/topHomeHover.gif");
    topPrintHover = newImage(imgFolder + "/header/topPrintHover.gif");
    topSupportHover = newImage(imgFolder + "/header/topSupportHover.gif");
    topKontoHover = newImage(imgFolder + "/header/topKontoHover.gif");

    home_news_over = newImage(imgFolder + "/header/home_news-over.gif");
    home_produkte_over = newImage(imgFolder + "/header/home_produkte-over.gif");
    home_impressum_over = newImage(imgFolder + "/header/home_impressum-over.gif");
    home_agb_over = newImage(imgFolder + "/header/home_agb-over.gif");
    login_over = newImage(imgFolder + "/header/login-over.gif");
    register_over = newImage(imgFolder + "/header/register-over.gif");
    preloadFlag = true;
  }
}

function flip( span_id )
{
  displayType = ( document.getElementById( span_id ).style.display == 'none' ) ? 'block' : 'none';
  document.getElementById( span_id ).style.display = displayType;
  return false;
}

function doubleflip( span_id )
{
  displayType_a = ( document.getElementById( span_id + "_a" ).style.display == 'none' ) ? 'block' : 'none';
  displayType_b = ( displayType_a == 'none' ) ? 'block' : 'none';
  document.getElementById( span_id + "_a" ).style.display = displayType_a;
  document.getElementById( span_id + "_b" ).style.display = displayType_b;
  return false;
}

function setChecked (fieldID)
{
  document.getElementById(fieldID).checked = true;
}

function selectAll()
{
  for(var i=0;i<document.frm.elements.length;i++)

  {
    if(document.frm.elements[i].name=='rights[]' && document.frm.elements[i].value=='1')
    {
      setDis = (document.frm.elements[i].checked==true) ? true : false;
    }
  }
  for(var i=0;i<document.frm.elements.length;i++)
  {
    if(document.frm.elements[i].name=='rights[]' && document.frm.elements[i].value!='1')
    {
      document.frm.elements[i].disabled = setDis;
    }
  }
}

function dlWin( id )
{
  var windowWidth = 300;
  var windowHeight = 150;

  if(document.layers) {
    var left = (screen.width - windowWidth) / 2;
    var top = (screen.height - windowHeight) / 2;
  } else {
    var left = (screen.width - windowWidth) / 2; 
    var top = ((screen.height - windowHeight) / 2) - 20;
  }

  popWindow = window.open('download_file.php?id=' + id, 'download', 'toolbar=no,location=no,scrollbars=yes,menubar=no,statusbar=no,resizable=yes,width=' + windowWidth + ',height=' + windowHeight + ',left=' + left + ',top=' + top);
  popWindow.focus();
  return false;
}