function txtbxLostFocus(sender,message) {
    var txtbx = sender;
    if (txtbx.value == '') {
        txtbx.value = message;
    }
}

function txtbxGotFocus(sender,message) {
    var txtbx = sender;
    if (txtbx.value == message) {
        txtbx.value = '';
    }
}