function checkEmail(strEmail) {	
	var arrMatch = strEmail.match(/^(\".*\"|[A-Za-z0-9_-]([A-Za-z0-9_-]|[\+\.])*)@(\[\d{1,3}(\.\d{1,3}){3}]|[A-Za-z0-9][A-Za-z0-9_-]*(\.[A-Za-z0-9][A-Za-z0-9_-]*)+)$/);
	if (arrMatch == null) return false;

	var arrIP = arrMatch[2].match(/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/);
	if (arrIP != null) {
		for (var i = 1; i <= 4; i++) {
			if (arrIP[i] > 255)  return false;
		}
	}
	return true;
}