function validate(form){
        if (isFilled(form.name) == false){
                alert("Bitte geben Sie Ihren Namen an!");
                form.name.focus();
                return(false);
                }
        if (isEmail(form.mail) == false) {
                alert("Bitte geben Sie Ihre Email-Adresse an, damit wir Sie bei Bedarf erreichen können.");
                form.mail.focus();
                return false;
                }
return(true);
}

function validatenl(form){
        if (isEmail(form.mail) == false) {
                alert("Bitte geben Sie Ihre Email-Adresse an.");
                form.mail.value = '';
                form.mail.focus();
                return false;
                }
return(true);
}

function isFilled(elm){
        if(elm.value == "" || elm.value == null) return false;
        else return true;
}

function isEmail(elm){
        if (elm.value.indexOf("@") != "-1" &&
                elm.value.indexOf(".") != "-1" &&
                elm.value != "")
         return true;
        else return false;
}



function setleftbox()
{
  var midbox = $('middlebox').getHeight();
  var n1 = $('newsbox1').getHeight();
  var n2 = $('newsbox2').getHeight();
  var gesamt = n1+n2+62;
  var nh = midbox - gesamt;
  if (nh < 0) return;
  $('leftboxunten').style.height = nh;
}

function setrightbox()
{
  var midbox = $('middlebox').getHeight();
  var n1 = $('partnerbox1').getHeight();
  var n2 = $('partnerbox2').getHeight();
  var gesamt = n1+n2+62;
  var nh = midbox - gesamt;
  if (nh < 0) return;
  $('rightboxunten').style.height = nh;
}

function setmiddlebox()
{
  var mv = $('mainverlauf').getHeight();
  mv = mv - 35;
  var midbox = $('middlebox').getHeight();
  if (mv >= midbox) 
    $('middlebox').style.height = mv;
  return;
}