} //獲取當月最后一天日期 function getFirstAndLastMonthDay( year, month){
var firstdate = year + '-' + month + '-01';
var day = new Date(year,month,0);
var lastdate = year + '-' + month + '-' + day.getDate();//獲取當月最后一天日期
return lastdate;
}
//獲取當月最后一天日期 function getLastMonthDay( year, month){
var firstdate = year + '-' + month + '-01';
var day = new Date(year,month,0);
var lastdate = day.getDate();//獲取當月最后一天日期
return lastdate;
} // 日期加一個月 2015-01 + 1 function addMonth(newdate, daysToAdd) {
var newtimems = newdate.getTime() + (daysToAdd * 1 * 24 * 60 * 60 * 1000);
newdate.setTime(newtimems);
var c = formatMonth(newdate);
return c;
} // 日期減一個月 2015-01 - 1 function subMonth(newdate,daysToAdd) {
var y =newdate.getFullYear();
var m =newdate.getMonth()+1;
var lastdate = getFirstAndLastMonthDay(y,m);//2015-01-01
var date=getLastMonthDay(y,m);
var lastd = lastdate.split('-');
var newtimems=new Date(lastd[0],parseInt(lastd[1])-1,lastd[2]).getTime()+(daysToAdd*date*24*60*60*1000);
newdate.setTime(newtimems);
var c =formatMonth(newdate);return c;
} // 日期格式話 yyyy-mm function formatMonth (date) { var m =date.getMonth()+1; if(m<10){
m="0"+m;
}
return date.getFullYear()+"-"+m;
}
// 日期格式話 yyyy-mm-dd function formatDate(date) { var m =date.getMonth()+1; var d = date.getDate(); if(m<10){
