长int到Javascript日期格式

我有一个长int值：20140307080000。这实际上是日期时间2014-03-07 08:00:00。我在JS中尝试了Date.parse，并将其转换为字符串，但无法将其作为Javascript日期对象检索。是否有任何javascript或D3内置方法将其转换为日期对象，而不是手动拆分它？

简直不敢相信它会这么简单。手动，但优雅。哇！

// Your date String
var d = "20140307080000";

// Convert it to the format 2014-03-07 08:00:00
var f = d.replace(/(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/, "$1-$2-$3 $4:$5:$6");

// Alerting after parse
alert(new Date(Date.parse(f)));

// This will alert "Fri Mar 07 2014 08:00:00 GMT+0530 (IST)"