//日期操作（yyyy-mm-dd,30,+/-）
function dateOperator(date,days,operator){
date = date.replace(/-/g,"/"); var nd = new Date(date); nd = nd.valueOf(); if(operator=="+"){ nd = nd + days * 24 * 60 * 60 * 1000; }else if(operator=="-"){ nd = nd - days * 24 * 60 * 60 * 1000; }else{ return false; } nd = new Date(nd); var y = nd.getFullYear(); var m = nd.getMonth()+1; var d = nd.getDate(); if(m <= 9) m = "0"+m; if(d <= 9) d = "0"+d; var temdate = y+"-"+m+"-"+d; return temdate ;}
//日期格式化
function dateToString(sdate){ if(sdate instanceof Date){ var dd = sdate.getDate() < 10 ? "0" + sdate.getDate() : sdate.getDate().toString(); var mmm = (sdate.getMonth()+1) < 10? "0"+(sdate.getMonth()+1) : (sdate.getMonth()+1); var yyyy = sdate.getFullYear().toString(); return yyyy+'-'+mmm+'-'+dd; }else{ return sdate; } }
例如要拿到当前日期减30天的时间：var startDate = dateOperator(dateToString(new Date()),30,"-"); 当前时间：var endDate = dateToString(new Date());