获取所选月份指定时间范围

//获取当前月份
page.getNowFormatDate = function() {
    var date = new Date();
    var seperator1 = "-";
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    var strDate = date.getDate();
    if (month >= 1 && month <= 9) {
        month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
        strDate = "0" + strDate;
    }
    var currentdate = year + seperator1 + month + seperator1 + strDate ;
    return currentdate;
};

//获取所选月份的第一天
page.getCurrentMonthFirst = function(){
     var startdate=new Date($("#datetime").val());
     startdate.setDate(1);
     return startdate;
};
//获取所选月份的最后一天
page.getCurrentMonthLast = function(){
     var endDate = new Date($("#datetime").val());
     var month=endDate.getMonth();
     var nextMonth=++month;
     var nextMonthFirstDay=new Date(endDate.getFullYear(),nextMonth,1);
     var oneDay=1000*60*60*24;
     return new Date(nextMonthFirstDay-oneDay);
};