// Only script specific to this form goes here.
// General-purpose routines are in a separate file.
  function validateOnSubmit() {
    var elem;
    var errs=0;
    // execute all element validations in reverse order, so focus gets
    // set to the first one in error.
    if (!validateTelnr  (document.forms.feedbackform.telnr, 'inf_telnr', true)) errs += 1; 
    if (!validateEmail  (document.forms.feedbackform.email, 'inf_email', true)) errs += 1; 
    if (!validatePresent(document.forms.feedbackform.name,  'inf_name'))        errs += 1; 

    if (errs>1)  alert('Oops! Looks like something is wrong. Please check your entry.');
    if (errs==1) alert('Oops! There is a field which needs correcting before sending. Please try again.');

    return (errs==0);
  };