function checkEmailAddress(field) {
	if(field.value.length>0){
			var good = false;
			var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
			if (goodEmail){
				good = true;
			} else {
				alert("Please enter a valid e-mail address.");
				good = false;
			}
		}
	}