该脚本可以获取距离今天若干天以后的详细日期，若要获取今日以前若干天的日期，只需要输入负数即可，如：-10天
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>分享JavaScript-sharejs.com</title>
<SCRIPT language="JavaScript">
<!-- Begin
function AddDays(form) {
DaysToAdd=document.form.DaysToAdd.value;
var now=new Date();
var newdate=new Date();
var newtimems=newdate.getTime()+(DaysToAdd*24*60*60*1000);
newdate.setTime(newtimems);
document.form.display.value=newdate.toLocaleString();
}
// End -->
</SCRIPT>
</head>
<body>
<form name=form>
<input type=text name=DaysToAdd size=5 value=10>
<input type=button value="天以后是..." onclick="AddDays(this.form)">
<input type=text name="display" size=35 value="">
</form>
<br><br>
<div align="center">
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