function checkMail(x){
  var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,6})+$/;
  if (filter.test(x)){
    return true;
  }else{
    return false;
  }
}

function IsNumeric(strString){
  var strValidChars = "0123456789";
  var strChar;
  var blnResult = true;
  if (strString.length == 0) return false;
  for (i = 0; i < strString.length && blnResult == true; i++){
    strChar = strString.charAt(i);
    if (strValidChars.indexOf(strChar) == -1){
      blnResult = false;
    }
  }
  return blnResult;
}


function Validate(){
  var form;
  var error = 0;
  form = document.newsletter;
  /*if(form.fornavn.value == "" || form.fornavn.value == "Fornavn"){
    form.fornavn.focus();
    document.getElementById("newsnone").className="newshidden";
    document.getElementById("news1").className="newsvisible";
    document.getElementById("news2").className="newshidden";
    document.getElementById("news3").className="newshidden";
    document.getElementById("news4").className="newshidden";
    error = "1";
    return false;
  }
  if(form.efternavn.value == "" || form.efternavn.value == "Efternavn"){
    form.efternavn.focus();
    document.getElementById("newsnone").className="newshidden";
    document.getElementById("news2").className="newsvisible";
    document.getElementById("news1").className="newshidden";
    document.getElementById("news3").className="newshidden";
    document.getElementById("news4").className="newshidden";
    error = "1";
    return false;
  }*/
  if(form.mobilnummer.value == "" || !IsNumeric(form.mobilnummer.value) || form.mobilnummer.value.length != "8"){
    form.mobilnummer.focus();
    document.getElementById("newsnone").className="newshidden";
    document.getElementById("news3").className="newsvisible";
    document.getElementById("news2").className="newshidden";
    document.getElementById("news1").className="newshidden";
    document.getElementById("news4").className="newshidden";
    error++;
  }
  if(form.email.value == "" || !checkMail(form.email.value)){
    form.email.focus();
    document.getElementById("newsnone").className="newshidden";
    document.getElementById("news4").className="newsvisible";
    document.getElementById("news2").className="newshidden";
    document.getElementById("news3").className="newshidden";
    document.getElementById("news1").className="newshidden";
    error++;
  }
  if(error <= 1){
	return true;
  	document.newsletter.submit();
	}else{
		return false;
	}
  }
  
function Clear(field){
  var form;
  form = document.newsletter;
  if(field == "fornavn" && form.fornavn.value == "Fornavn"){
    form.fornavn.value="";
  }
  if(field == "efternavn" && form.efternavn.value == "Efternavn"){
    form.efternavn.value="";
  }
  if(field == "mobilnummer" && form.mobilnummer.value == "Mobilnummer"){
    form.mobilnummer.value="";
  }
  if(field == "email" && form.email.value == "E-Mail"){
    form.email.value="";
  }
}
function Blur(field){
  var form;
  form = document.newsletter;
  if(field == "fornavn"){
    if(form.fornavn.value == ""){
      form.fornavn.value = "Fornavn";
    }
  }
  if(field == "efternavn"){
    if(form.efternavn.value == ""){
      form.efternavn.value = "Efternavn";
    }
  }
  if(field == "mobilnummer"){
    if(form.mobilnummer.value == ""){
      form.mobilnummer.value = "Mobilnummer";
    }
  }
  if(field == "email"){
    if(form.email.value == ""){
      form.email.value = "E-Mail";
    }
  }
}