function validateOnSubmit() {
	var elem = document.getElementById("error");
	
    var elem;
    var errs=0;
	
	//alert("starting validation");
	
	elem.innerHTML = " ";
		
    // execute all element validations in reverse order, so focus gets
    // set to the first one in error.
    if (!validatePresent(document.forms.contactForm.required_Name, "error", "Name")) errs += 1;
    
    if (!validatePresent(document.forms.contactForm.required_Message, "error", "Message")) errs += 1;
	if (!validateEmail(document.forms.contactForm.required_Email, "error", true, "Email")) errs += 1;

    if (errs>1)  alert('There are fields which require correction before sending');
    if (errs==1) alert('There is a field which requires correction before sending');
	
	if(errs>0) {
		elem.innerHTML += "";
	}
	
    return (errs==0);
  };