js获取系统时间前六个月的那天

Question

js获取系统时间前六个月的那天，求大神帮助一下，代码要怎么写，自己写完之后得到一堆乱码

Answer 1

date = new Date(); year = date.getFullYear(); month = date.getMonth(); sdate = date.getDate(); olddate = new Date(year, month-6, sdate); alert(olddate.getFullYear()+'-'+(olddate.getMonth()+1)+'-'+olddate.getDate());