function validateFormOnSubmit(theForm) {
var reason = "";

reason += validatenyhedsmailen(theForm.a_nyhedsmailen);  
reason += validateFornavn(theForm.b_fornavn);
reason += validateEmail(theForm.g_email);
	

      
  if (reason != "") {
    alert("Einige Felder sind nicht ausgefüllt:\n" + reason);
    return false;
  }
  return true;
}


function validatenyhedsmailen(fld) {
    var error = "";
       if (fld.value. checked == false){
        fld.style.background = 'Yellow'; 
        error = "Bitte Newsletter auszufüllen-.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;   
}





function validateFornavn(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = '#ffcc33'; 
        error = "Bitte geben Sie den namen an.\n";
    } else if ((fld.value.length < 1) || (fld.value.length > 25)) {
        fld.style.background = '#ffcc33'; 
        error = "Der name hat die verkehrte Länge.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}



function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}
function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = '#ffcc33';
        error = "Bitte Newsletter auszufüllen\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = '#ffcc33';
        error = "Die Emailadresse ist ungültig.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = '#ffcc33';
        error = "Die Emailadresse enthält nicht gültige Symbole.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}