inet_boy,
function f(t){
t.disabled = true;
var p = t.parentNode;
new Countdown({
time: 5,
width: 52,
height: 23,
rangeHi: 'minute',
hideLabels: true,
inline: true,
target: p,
onComplete: function(){
p.removeChild(p.lastChild);
t.disabled = false;
}
});
}
<div><input type="button" value="Click" onclick="f(this)"></div>
<div><input type="button" value="Click" onclick="f(this)"></div>