tayfunerbilen/index.html

## index.html
<!doctype html>
<html lang="en">
<head>

    <meta charset="UTF-8">
    <title>Document</title>

    <script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>
    <script src="jquery.timer.js"></script>

</head>
<body>

Kalan süre: <span id="timer"></span>
<script>
$('#timer').timer(5, function(){
    alert('sona erdi!');
});
</script>

Kalan süre: <span id="timer2"></span>
<script>
$('#timer2').timer([5, 10], function(){
    alert('sona erdi!');
});
</script>

</body>
</html>

## jquery.timer.js
$.fn.timer = function(time, callback){
    if ( $.isArray(time) ){
        this.minute = time[0];
        this.second = time[1];
    } else {
        this.minute = time - 1;
        this.second = 60;
    }
    var self = this,
        timer = function(){
            if ( self.minute == '00' && self.second == '00' ){
                clearInterval(self.interval);
                self.interval = null;
                callback();
            } else {
                if ( self.second > 0 ) self.second--;
                else {
                    self.minute -= 1;
                    self.second = 59;
                }
                $(self).text((self.minute < 10 ? '0' + self.minute : self.second) + ':' + (self.second < 10 ? '0' + self.second : self.second));
            }
        };
    timer();
    this.interval = setInterval(timer, 1000);
}
	<!doctype html>
	<html lang="en">
	<head>

	<meta charset="UTF-8">
	<title>Document</title>

	<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>
	<script src="jquery.timer.js"></script>

	</head>
	<body>

	Kalan süre: <span id="timer"></span>
	<script>
	$('#timer').timer(5, function(){
	alert('sona erdi!');
	});
	</script>

	Kalan süre: <span id="timer2"></span>
	<script>
	$('#timer2').timer([5, 10], function(){
	alert('sona erdi!');
	});
	</script>

	</body>
	</html>
	$.fn.timer = function(time, callback){
	if ( $.isArray(time) ){
	this.minute = time[0];
	this.second = time[1];
	} else {
	this.minute = time - 1;
	this.second = 60;
	}
	var self = this,
	timer = function(){
	if ( self.minute == '00' && self.second == '00' ){
	clearInterval(self.interval);
	self.interval = null;
	callback();
	} else {
	if ( self.second > 0 ) self.second--;
	else {
	self.minute -= 1;
	self.second = 59;
	}
	$(self).text((self.minute < 10 ? '0' + self.minute : self.second) + ':' + (self.second < 10 ? '0' + self.second : self.second));
	}
	};
	timer();
	this.interval = setInterval(timer, 1000);
	}