function validate(thisForm) {
with (thisForm) {
var alertMessage = "Please specify:\n";

if (your_first_name.value == "") alertMessage += "\Your first name\n";
if (your_last_name.value == "") alertMessage += "\Your last name\n";
if (your_email_address.value == "") alertMessage += "\Your email address\n";
if (phoneNumber.value == "") alertMessage += "\Your phone number\n";
if (your_job_title.value == "") alertMessage += "\Your job title\n";
if (your_company_name.value == "") alertMessage += "Your company name\n";

if (alertMessage != "Please specify:\n") {
alert(alertMessage);
return false;
} else return true;
} }