//=========================================================================
	// This function performs validity checks on the feedback form and displays 
	// an informative message to the user if any errors occurred.
	// If no error has occured an email is sent and the thank you page will be displayed.
	//=========================================================================
	function frmFeedback_onSubmit() {
	var bReturnValue = false;
		
  //Perform validity checks on the second half of the form.
  
  //Check if the user entered his full name.
  if (IsEmpty(document.getElementById('txtName').value).ReturnCode > 0) {
    alert('Please enter your name');
    document.getElementById('txtName').focus;
    return bReturnValue;
  }
  
  //Check if the user entered his job number.
  if (IsEmpty(document.getElementById('txtJobNo').value).ReturnCode > 0) {
    alert('Please enter your Job Number');
    document.getElementById('txtJobNo').focus;
    return bReturnValue;
  }
      
  //Check if the user entered a valid phone number. 
  hReturnInfo = IsValidPhoneNumber(document.getElementById('txtPhone').value, false); 
  if (hReturnInfo.ReturnCode > 0) {
    alert(hReturnInfo.ErrorDescription);
    document.getElementById('txtPhone').focus;
    return bReturnValue;
  }

  //Format the phone number properly.
  document.getElementById('txtPhone').value = FormatPhoneNumber(document.getElementById('txtPhone').value);
  
  //Check if the user entered a valid e-mail address. 
  hReturnInfo = IsValidEMailAddress(document.getElementById('txtEmail').value, false); 
  if (hReturnInfo.ReturnCode > 0) {
    alert(hReturnInfo.ErrorDescription);
    document.getElementById('txtEmail').focus;
    return bReturnValue;
  }
  
  //if you got this far, the form is probably filled out correctly
  bReturnValue = true;
  
  return bReturnValue;
	}