JQuery按照指定長度為數(shù)字前面補零

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function?PrefixInteger(num,?length)?{
????return?(Array(length).join('0')?+?num).slice(-length);
}

PrefixInteger(8,2);?返回08，表示長度為2，數(shù)字8前面補一個0。

JQuery倒計時

var?rest?=?4350859;??//時間戳

console.log(rest);

$day?=?Math.floor(rest/(60*60*24));

console.log($day);

$hour?=?Math.floor((rest?-?$day?*?(60*60*24))/(60*60));

console.log($hour);

$minite?=?Math.floor((rest?-?$day?*?(60*60*24)?-?$hour?*?(60*60))/60);

console.log($minite);

$second?=?Math.floor(rest?-?$day?*?(60*60*24)?-?$hour?*?(60*60)?-?$minite?*?60);

console.log($second);

$day?=?PrefixInteger($day,2);
$hour?=?PrefixInteger($hour,2);
$minite?=?PrefixInteger($minite,2);
$second?=?PrefixInteger($second,2);

$("#my_day").html($day);
$("#my_hour").html($hour);
$("#my_minite").html($minite);
$("#my_second").html($second);

window.setInterval(function(){

?????rest--;

????console.log(rest);

????$day?=?Math.floor(rest/(60*60*24));

????console.log($day);

????$hour?=?Math.floor((rest?-?$day?*?(60*60*24))/(60*60));

????console.log($hour);

????$minite?=?Math.floor((rest?-?$day?*?(60*60*24)?-?$hour?*?(60*60))/60);

????console.log($minite);

????$second?=?Math.floor(rest?-?$day?*?(60*60*24)?-?$hour?*?(60*60)?-?$minite?*?60);

????console.log($second);

????$day?=?PrefixInteger($day,2);
????$hour?=?PrefixInteger($hour,2);
????$minite?=?PrefixInteger($minite,2);
????$second?=?PrefixInteger($second,2);

????$("#my_day").html($day);
????$("#my_hour").html($hour);
????$("#my_minite").html($minite);
????$("#my_second").html($second);
},1000);

html代碼：

????
?00
????????天

????
????.
????
?00
????????時

????
????:
????
?00
????????分

????
????:
????
?00
????????秒

????

這樣倒計時功能就完成了，這里css樣式就需要大家自己去寫了?。?！