function myRandom(max, min) {
return Math.floor(Math.random()*(max-min)) + min;
}

자바스크립트 랜덤값지정하는 함수입니다~~

var Example2 = new (function() {
var $countdown,
$form, // Form used to change the countdown time
incrementTime = 70,
currentTime = timeRandom(1000,3000),
updateTimer = function() {
$countdown.html(formatTime(currentTime));
if (currentTime == 0) {
Example2.Timer.stop();
timerComplete();
Example2.resetCountdown();
return;
}
currentTime -= incrementTime / 10;
if (currentTime < 0) currentTime = 0;
},
timerComplete = function() {
alert('Example 2: Countdown timer complete!');
},
timerRandem = function(max, min) {
return Math.floor(Math.random()*(max-min)) + min;
},

여기까지 붙여넣어보세요~

var Example2 = new (function() {
var $countdown,
$form, // Form used to change the countdown time
incrementTime = 70,
currentTime = timeRandom(1000,3000),
updateTimer = function() {
$countdown.html(formatTime(currentTime));
if (currentTime == 0) {
Example2.Timer.stop();
timerComplete();
Example2.resetCountdown();
return;
}
currentTime -= incrementTime / 10;
if (currentTime < 0) currentTime = 0;
},
timerComplete = function() {
alert('Example 2: Countdown timer complete!');
},
timerRandem = function(max, min) {
return Math.floor(Math.random()*(max-min)) + min;
},
init = function() {
$countdown = $('#countdown');
Example2.Timer = $.timer(updateTimer, incrementTime, true);
$form = $('#example2form');
$form.bind('submit', function() {
Example2.resetCountdown();
return false;
});
};
this.resetCountdown = function() {
var newTime = parseInt($form.find('input[type=text]').val()) * 100;
if (newTime > 0) {currentTime = newTime;}
this.Timer.stop().once();
};
$(init);
});

이렇게 넣는것이 맞는지요?
카운트 시작을 안합니다.