function displaymessage(msg) {    
    var elem = document.getElementById("submsg");
    if (elem.style.display != "block") elem.style.display = "block";
    elem.innerHTML = msg;
}

function hidemessage() {
    var elem = document.getElementById("submsg");
    if (elem.style.display != "none") elem.style.display = "none";
    elem.innerHTML = "";
}

function processResult(returnmessage, context) {
    displaymessage(returnmessage);
}

function processError(returnmessage, context) {
    displaymessage("An error occurred while processing your subscription.");
}