function validate(newsletter) {
var passed = true;

if (newsletter.first_name.value == "") {
passed = false;
window.alert("Please enter your first name");
newsletter.first_name.focus();
return false;
}

if (newsletter.last_name.value == "") {
passed = false;
window.alert("Please enter your last name");
newsletter.last_name.focus();
return false;
}

if (newsletter.interested_topic.value == "") {
passed = false;
window.alert("Please enter the topic you are interested in");
newsletter.interested_topic.focus();
return false;
}

if (newsletter.email_address.value == "") {
passed = false;
window.alert("Please enter your email address");
newsletter.email_address.focus();
return false;
}

window.status=passed;
return window.status;
}