Date Beginning and end of month

gistfile1.js

	function beginningOfMonth(date){
		if(typeof date === 'undefined'){
			date = new Date();
		}
		date.setMilliseconds(0);
		date.setSeconds(0);
		date.setMinutes(0);
		date.setHours(0);
		date.setDate(1);
		return new Date(date);
	}

	function endOfMonth(date){
		if(typeof date === 'undefined'){
			date = new Date();
		}
		return new Date((new Date(date.getFullYear(), date.getMonth()+1,1))-1);
	}