JavaScript capture days before and after days of instance

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//Based on time Chou function Return date (2013-10-10); Function Getlocaltime (ns) {     var d = new Date (parseint (NS)). toLocaleDateString (). Replace (/[^ D]/g, ' _ '). Split ('_');     var now = [];        for (i=0;i<3;i++) {   & nbsp;     Now[i] = d[i].length==1? ' 0 ' + d[i]: d[i];    }     return Now.join ('-'); } //Calculate added days (2012-01-01, 2) Two days after function calnstime (StartDate, day) {     var now = + New Date (StartDate);     scale = 1000 * 60 * 60 * 24;//1 days     return now + scale * DAY; } Console.log (getlocaltime (' 2013-12-31 ', 2));//Next two days Console.log (getlocaltime calnstime (' 2013-12-31 ',-2)); The first two days