Date functions in Javascript

DateFunctions.js

var DateUtil = {	
  /* Get the date for yesterday in YYYY-MM-DD format */
	getYesterdayYMD : function() {
		var d = new Date();
		var m = d.getMonth() + 1;
		var n = d.getDate() - 1;
		var ds = d.getFullYear() + "-" +  (m< 10? '0' + m : m) + "-" + (n<10 ? '0' + n : n);
		return ds;
	},
	/* Get the date for today in YYYY-MM-DD format */
	getDateYMD : function(d) {
		var m = d.getMonth()+1;
		var n = d.getDate();
		var ds = d.getFullYear() + "-" + (m<10 ? '0' + m : m) + "-" + (n<10 ? '0' + n : n);
		return ds;
	}
}