This is a code snippet for basic Java Script to validate email address using a regular expression.
For example a name like O'Reilly is perfectly valid input, but could cause a crash or worse if inserted unescaped into SQL.
The ending quotation mark must not be preceded by a backslash character (\).
If the first character is a quotation mark, match a beginning quotation mark followed by at least one occurrence of any character, followed by an ending quotation mark.
Instead, the regular expression merely verifies that the top-level domain name consists of between two and twenty-four ASCII characters, with alphanumeric first and last characters and the remaining characters being either alphanumeric or a hyphen (-).
From Milliseconds(200)) Catch e As Regex Match Timeout Exception Return False End Try If invalid Then Return False ' Return true if str In is in valid email format. methods can be included in a library of regular expression utility methods, or they can be included as private static or instance methods in the application class.