function validate()
{
  // var f = document.forms[0];
  var objName = document.getElementById('idName'); 
  var objPhone = document.getElementById('idPhone');  
  var objEmail = document.getElementById('idEmail');
  var objCompany = document.getElementById('idCompany'); 
  var objNumUsers = document.getElementById('idNumOfUsers');
  var objComments = document.getElementById('idComments');

  if (objName.value == '') {
    alert("Please provide your name.");
    objName.focus();
    return false;
  }
  
  if (objPhone.value == '') {
    alert("Please provide your phone number.");
    objPhone.focus();
    return false;
  }

  if (objEmail.value == '') {
    alert("Please provide your e-mail address.");
    objEmail.focus();
    return false;
  }

  if (objCompany.value == '') {
    alert("Please provide your company name.");
    objCompany.focus();
    return false;
  }

  if (objNumUsers.value == '') {
    alert("Please indicate how many people need the system.");
    objNumUsers.focus();
    return false;
  }

  if (objComments.value == '') {
    if (!confirm("You did not describe how we can help you. Would you like to" +
	" send the message anyway?"))
      return false;
  }
  return true;
}