Avoid multiple clicks on same DOM object and reactivates it after 5 seconds.

gistfile1.js

function disable_a_moment(o) {
    o.disabled = true;
    o.value = o.value + "…";
    setTimeout(function() {
        o.disabled = false;
        o.value = o.value.substr(0, o.value.length - 1);
    }, 5000);
}