dateStr = sel[1].innerText.match(/\d{4}-\d{2}-\d{2}/)[0]; postDate = new Date(dateStr); today = new Date(); daysDiff = Math.ceil((today - postDate) / (1000 * 60 * 60 * 24)); daysDiff 计算不用到毫秒，改成到天
已经改成了到天的计算。
![dateStr = sel[1].innerText.match(/\d{4}-\d{2}-\d{2}/)[0];
postDate = new Date(dateStr);
today = new Date();
daysDiff = Math.ceil((today - postDate) / (1000 * 60 * 60 * 24));
daysDiff 计算不用到毫秒，改成到天](http://copyright.bdstatic.com/vcg/creative/9e4df8a48dbf89878c73bb8cd013ed66.jpg "dateStr = sel[1].innerText.match(/\d{4}-\d{2}-\d{2}/)[0];
postDate = new Date(dateStr);
today = new Date();
daysDiff = Math.ceil((today - postDate) / (1000 * 60 * 60 * 24));
daysDiff 计算不用到毫秒，改成到天")
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