function validering(indsend){

  if(indsend.email.value==''){
    alert('You must enter your email adress');
    indsend.email.focus();
    return false;
  }

  if(!indsend.email.value.match(/^.*?@\w[\w.-]*\.[a-z]{2,6}$/i)){
    alert('Not a valid email adress');
    indsend.email.focus();
    return false;
  }

  return true;
}