Countdown start on button press - php

Question

Ive got an problem. I have an button that sends an command to an perl script. For 60 seconds the page will just load and load. So i need an countdown to tell the user how much time until the perl script is finished. So i got his javascript from the web that automaticly counts down when the page loads. Is it possible to reverse this?
http://goo.gl/cYdKg

Answer 1

You see what happens, when you don't state your requirements correctly? Two people doing the same wrong thing (bad for us, we did not clarified before, tho).
$.fn.timedDisable = function(time, callback) {
if (time == null) {
time = 5000;
}
var seconds = Math.ceil(time / 1000);
return $(this).each(function() {
$(this).attr('disabled', 'disabled');
var disabledElem = $(this);
var originalText = this.innerHTML;
disabledElem.text( originalText + ' (' + seconds + ')');
var interval = setInterval(function() {
disabledElem.text( originalText + ' (' + --seconds + ')');
if (seconds === 0) {
disabledElem.removeAttr('disabled')
.text(originalText);
clearInterval(interval);
if (typeof callback !== 'undefined')
callback();
}
}, 1000);
});
};
$(function() {
$('#btnContinue').click(function() {
$(this).timedDisable(5000, function() {
window.alert('done');
});
});
});