如何使用JavaScript添加减去日期？

码：

var date = new Date('2011', '01', '02');alert('the original date is ' + date);var newdate = new Date(date);newdate.setDate(newdate.getDate() - 7); // minus the datevar nd = new Date(newdate);alert('the new date is ' + nd);

使用Datepicker：

$("#in").datepicker({    minDate: 0,    onSelect: function(dateText, inst) {       var actualDate = new Date(dateText);       var newDate = new Date(actualDate.getFullYear(), actualDate.getMonth(), actualDate.getDate()+1);        $('#out').datepicker('option', 'minDate', newDate );    }});$("#out").datepicker();​

可能会派上用场的其他东西：

getDate()   Returns the day of the month (from 1-31)getDay()    Returns the day of the week (from 0-6)getFullYear()   Returns the year (four digits)getHours()  Returns the hour (from 0-23)getMilliseconds()   Returns the milliseconds (from 0-999)getMinutes()    Returns the minutes (from 0-59)getMonth()  Returns the month (from 0-11)getSeconds()    Returns the seconds (from 0-59)