function validate(form) {
    if (form.firstName.value.length == 0)
    {
        alert("Please enter your first name.")
        form.firstName.focus()
        return false
    }

    if (form.lastName.value.length == 0)
    {
        alert("Please enter your last name.")
        form.lastName.focus()
        return false
    }

    if (form.heardAbout.value.length == 0)
    {
        alert("Please let us know how you heard about us.")
        form.heardAbout.focus()
        return false
    }

    if (form.email.value.length == 0)
    {
        alert("Please enter your e-mail address.")
        form.email.focus()
        return false
    }

    if (form.email.value.indexOf("@") == -1)
    {
        alert("Please enter a valid e-mail address.");
        form.email.focus();
        return false;
    }

    if (form.message.value.length == 0)
    {
        alert("Please input a message.")
        form.message.focus()
        return false
    }

}