jQuery executes 60 seconds after sending the SMS verification code

 
<!DOCTYPE html>
<html>
<head>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript"> 
var countdown=60; 
function settime(obj) { 
    if (countdown == 0) { 
        obj.removeAttribute("disabled");    
        obj.value = "Бесплатный код проверки"; 
        countdown = 60; 
        return;
    } else { 
        obj.setAttribute("disabled", true); 
                 obj.value = "re -send (" + countdown + ")"); 
        countdown--; 
    } 
setTimeout(function() { 
    settime(obj) }
    ,1000) 
}
  
</script>
<body> 
 <input type = "кнопка" id = "btn" value = "бесплатный код проверки" οnclick = "settime (this)" /> /> 
  
</body>
</html>

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