js acquisition date (yesterday, last week, last month, last year or last year)

The following codes are available and pro-test, computing week did spend a great strength, and the case of the plan period to be considered as New Year's Eve:

. $ ( "# Report") Change (function () { 
    var = $ Report (the this) .val (); 
    var beginTime = ''; 
    var endTime = ''; 
    var = new new myDate a Date (); 

    IF (Report = = 'Daily') { 
　　　　 // Get last 
        myDate.setTime (myDate.getTime () - 24 * 3600 * 1000); 
        beginTime myDate.getFullYear = () + "-" + (myDate.getMonth () +. 1) + " - "+ myDate.getDate (); 
        endTime = beginTime; 
    } the else IF (Report == 'Weekly') { 
        // Get the start and end times of the week 
        var weekDate = new Date (myDate.getTime ( ) - 7 * 24 * 3600 * 1000); // start time is calculated using 
        var weekDate2 = new Date (myDate.getTime ( ) - 7 * 24 * 3600 * 1000); // end time by calculating 

        var day = weekDate.getDay ();
        var time = weekDate.getDate()-day+(day===0?-6:1);

        var startDate = new Date(weekDate.setDate(time));
        beginTime = startDate.getFullYear()+'-'+(startDate.getMonth()+1)+'-'+startDate.getDate();
        var endDate = new Date(weekDate2.setDate(time+6));
        endTime = endDate.getFullYear()+'-'+(endDate.getMonth()+1)+'-'+endDate.getDate();

    } else if (report == 'monthly') {
        // 获取上一月的开始和结束时间
        var year = myDate.getFullYear();
        var month = myDate.getMonth();
        if (month === 0) {
            month = 12;
            year = year-1;
        } else if (month < 10) {
            month = '0'+month;
        }
        var monthDate = new Date(year, month, 0);
        beginTime = year+'-'+month+'-01';
        endTime = year+'-'+month+'-'+monthDate.getDate();

    } else if (report == 'annual') {
        // 获取去年的开始和结束时间
        var year = myDate.getFullYear()-1;
        beginTime = year+'-01-01';
        endTime = year+'-12-31';
    }

    $("#begintime").val(beginTime);
    $("#endtime").val(endTime);

});