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

if (first_name.value == "") alertMessage += "\nFirst Name";
if (email.value == "") alertMessage += "\nEmail";
if (comments.value == "") alertMessage += "\nComments";
if (alertMessage != "Please specify:\n") {
alert(alertMessage);
return false;
} else return true;
} }