Regex for minimally testing valid email addresses. Looks for some characters, @ symbol, some characters, a period, then some more characters.

emailregex.js

var regex = /^.+@.+\..+$/;
var tests = Array(	'test@test.com', 'testATtest.com', 'test@testDOTcom', 
			'test.period@test.com', 'test+period@test.com', 'test@test.co.uk');
	
for(var i = 0; i < tests.length; i++){
	var result = regex.exec( tests[i] );
	console.log('Testing: ' + tests[i]);
	if( result ){
		console.log('match found\n');
	} else {
		console.log('no matches\n');
	}
}