<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>js获取日期：前天、昨天、今天、明天、后天 </title></head><body><script language="JavaScript" type="text/javascript">function getDay(day){var today = new Date();var targetday_milliseconds=today.getTime() + 1000*60*60*24*day; today.setTime(targetday_milliseconds); //注意，这行是关键代码 var tYear = today.getFullYear();var tMonth = today.getMonth();var tDate = today.getDate();tMonth = doHandleMonth(tMonth + 1);tDate = doHandleMonth(tDate);return tYear+"-"+tMonth+"-"+tDate;}function doHandleMonth(month){var m = month;if(month.toString().length == 1){m = "0" + month;}return m;}document.write("前天："+getDay(-2));document.write("<br />昨天："+getDay(-1));document.write("<br />今天："+getDay(0));document.write("<br />明天："+getDay(1));document.write("<br />后天："+getDay(2));document.write("<br />大后天："+getDay(3));</script></body></html>
