var submitcount = 0;

function reset() {
    var sub = document.getElementById("subject");
    var mes = document.getElementById("message");

    sub.value == "";
    mes.value == "";
}

function checkFields() {
    var sub = document.getElementById("subject");
    var mes = document.getElementById("message");

    if (sub.value == "" || mes.value == "") {
        alert("Please complete any empty fields.");
        return false;
    }
    else {
        if (submitcount == 0) {
            submitcount++;
            return true;
        }
        else {
            alert("Your post has been submitted.");
            return false;
        }
    }
}