duedate計數器適用於Chrome，但不適用Firefox NaN錯誤

當涉及到此js代碼時，Firefox無法正常工作。但它在Chrome中正常工作。duedate計數器適用於Chrome，但不適用Firefox NaN錯誤

這個和document.getElementById("days").innerText = d;有關嗎？
我需要parseInt嗎？ IDK如何做到這一點，如果我必須這樣做..哈哈
主要問題是如何讓這個工作在Firefox？

<div id="dueDate-counter"> 
 
    \t <table> 
 
    \t \t <tr> 
 
    \t \t \t <td>days</td> 
 
    \t \t \t <td>hrs</td> 
 
    \t \t \t <td>mns</td> 
 
    \t \t \t <td>secs</td> 
 
    \t \t </tr> 
 
    \t \t <tr> 
 
    \t \t \t <td id="days"></td> 
 
    \t \t \t <td id="hours"></td> 
 
    \t \t \t <td id="minutes"></td> 
 
    \t \t \t <td id="seconds"></td> 
 
    \t \t </tr> 
 

 
    \t </table> 
 

 
    \t <script type="text/javascript"> 
 
    \t \t function countdown() { 
 
    \t \t \t var now = new Date(); 
 
    \t \t \t var eventDate = new Date("<%= reservation.due_date %>"); 
 
    \t \t \t <%= puts "here is reservation !!!!!!!" %>; 
 
    \t \t \t <%= puts "#{reservation.due_date}" %>; 
 
    \t \t \t var currentTime = now.getTime(); 
 
    \t \t \t var eventTime = eventDate.getTime(); 
 

 
    \t \t \t var remTime = eventTime - currentTime; 
 

 
    \t \t \t var s = Math.floor(remTime/1000); 
 
    \t \t \t var m = Math.floor(s/60); 
 
    \t \t \t var h = Math.floor(m/60); 
 
    \t \t \t var d = Math.floor(h/24); 
 

 
    \t \t \t h %= 24; 
 
    \t \t \t m %= 60; 
 
    \t \t \t s %= 60; 
 

 
    \t \t \t h = (h < 10) ? "0" + h : h; 
 
    \t \t \t m = (m < 10) ? "0" + m : m; 
 
    \t \t \t s = (s < 10) ? "0" + s : s; 
 

 
    \t \t \t document.getElementById("days").textContent = d; 
 
    \t \t \t document.getElementById("days").innerText = d; 
 

 
    \t \t \t document.getElementById("hours").textContent = h; 
 
    \t \t \t document.getElementById("minutes").textContent = m; 
 
    \t \t \t document.getElementById("seconds").textContent = s; 
 

 
    \t \t \t \t setTimeout(countdown, 1000); 
 
    \t \t \t \t \t } 
 

 
    \t \t \t \t countdown(); 
 

 
    \t </script> 
 

 
    </div>