function validate(formObj) {
	warning = "";
	if (formObj.txtFirstName.value == "") warning += "\n - First Name";
	if (formObj.txtLastName.value == "") warning += "\n - Last Name";
	if (formObj.txtEmail.value == "") warning += "\n - Email";
	if (formObj.txtComments.value.length > 500 ) warning += "\n - Comments cannot be more than 500 characters";

	if (warning != "") {
        alert("ERROR:  The form cannot be submitted because\nthe following fields are incomplete or invalid:\n" + warning);
		return false;
	}
    formObj.submit();
}