Try period-laced variations of an input email

gistfile1.js

		validateEmail = function(email) { 
			var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
		return re.test(email);
} 
		emailPeriodPossibilities = function(str) { 
			if(!validateEmail(str)) { return false }
			var name = str.match(/^([^@]*)@/)[1]; 
			var domain = str.match(/^([^@]*)@(.*)/)[2]; 
			matches = []; 
			for(var i=1;i<name.length;i++) { 
				var firstHalf = name.substr(0,i);
				var secondHalf = name.substr(i);
				matches.push(firstHalf+'.'+secondHalf+'@'+domain);
			} 
			return matches;
		};
		
		var e = emailPeriodPossibilities('username@domain.com');
		console.log(e);