function toggleMe(a, displaysetting)
{
  var e = document.getElementById(a);
  if(!e)
  {
    return(true);
  }
  if(displaysetting)
  {
    e.style.display = displaysetting;
  }
  else
  {
    if(e.style.display == 'none')
    {
      e.style.display = 'block';
    } 
    else 
    {
      e.style.display = 'none';
    }
  }
  return true;
}

function toggleArrow(a)
{
  if(a.className == 'nav_einblenden')
  {
    a.className = 'nav_ausblenden';      
  }
  else if(a.className == 'nav_ausblenden' || a.className == '')
  {
    a.className = 'nav_einblenden';
  }
}



var pop = null;

function popdown() {
  if (pop && !pop.closed) pop.close();
}

function popup(obj,w,h) {
  var url = (obj.getAttribute) ? obj.getAttribute('href') : obj.href;
  if (!url) return true;
  w = (w) ? w += 20 : 150;  // 150px*150px is the default size
  h = (h) ? h += 25 : 150;
  var args = 'width='+w+',height='+h+',resizable';
  popdown();
  pop = window.open(url,'',args);
  return (pop) ? false : true;
}

window.onunload = popdown;
window.onfocus = popdown;


function resetForm()
{
  document.forms.contact_form.name.value="";
  document.forms.contact_form.address.value="";
  document.forms.contact_form.city.value="";
  document.forms.contact_form.phone.value="";
  document.forms.contact_form.email.value="";
  document.forms.contact_form.comment.value="";
}