PreviouWeek & NextWeek JavaScript

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Javascript

SharePoint2013

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my code can only view past week and next week. but I want to see all the previous and future weeks. Thus the two features will function as calendar functions.

will be really grateful if you respond with codes

here are my cods

function PreviousWeek() {
    function getPreviousWeekDay(now, d) {
        var x = ((d) - now.getDay());
        now.setDate(now.getDate() + x - 7);
        return now;
    }

var now = new Date();

var previousMonday = getPreviousWeekDay(new Date(), 1);
var previousTusday = getPreviousWeekDay(new Date(), 2);
var previousWensday = getPreviousWeekDay(new Date(), 3);
var previousThirsday = getPreviousWeekDay(new Date(), 4);
var previousFriday = getPreviousWeekDay(new Date(), 5);
var previousSaturday = getPreviousWeekDay(new Date(), 6);
var previousSunday = getPreviousWeekDay(new Date(), 7);

$('#lbl1').html(previousMonday.format('yyyy-MM-dd'));
$('#lbl2').html(previousTusday.format('yyyy-MM-dd'));
$('#lbl3').html(previousWensday.format('yyyy-MM-dd'));
$('#lbl4').html(previousThirsday.format('yyyy-MM-dd'));
$('#lbl5').html(previousFriday.format('yyyy-MM-dd'));
$('#lbl6').html(previousSaturday.format('yyyy-MM-dd'));
$('#lbl7').html(previousSunday.format('yyyy-MM-dd'));


function NextWeek()
{
    function getNextWeekDay(now, d)
    {
        var x = ((d) - now.getDay());
        now.setDate(now.getDate() + x + 7);
        return now;
    }

var now = new Date();

var nextMonday = getNextWeekDay(new Date(), 1);
var nextTusday = getNextWeekDay(new Date(), 2);
var nextWensday = getNextWeekDay(new Date(), 3);
var nextThirsday = getNextWeekDay(new Date(), 4);
var nextFriday = getNextWeekDay(new Date(), 5);
var nextSaturday = getNextWeekDay(new Date(), 6);
var nextSunday = getNextWeekDay(new Date(), 7);

$('#lbl1').html(nextMonday.format('yyyy-MM-dd'))
$('#lbl2').html(nextTusday.format('yyyy-MM-dd'))
$('#lbl3').html(nextWensday.format('yyyy-MM-dd'))
$('#lbl4').html(nextThirsday.format('yyyy-MM-dd'))
$('#lbl5').html(nextFriday.format('yyyy-MM-dd'))
$('#lbl6').html(nextSaturday.format('yyyy-MM-dd'))
$('#lbl7').html(nextSunday.format('yyyy-MM-dd'))