function validate()
{
  var f = document.forms[0];
  if (f.name.value == "") {
    alert("Please provide your name.");
    f.name.focus();
    return false;
  }
  
  
  if (f.phone.value == "") {
    alert("Please provide your phone number.");
    f.phone.focus();
    return false;
  }
  if (f.email.value == "") {
    alert("Please provide your e-mail address.");
    f.email.focus();
    return false;
  }
  if (f.company.value == "") {
    alert("Please provide your company name.");
    f.company.focus();
    return false;
  }
  if (f.numppl.value == "") {
    alert("Please indicate how many people need the system.");
    f.numppl.focus();
    return false;
  }
  if (f.body.value == "") {
    if (!confirm("You did not describe how we can help you. Would you like to" +
	" send the message anyway?"))
      return false;
  }
  return true;
}