Hi   This regular expression checks following things   (?=^[a-zA-Z])(?=.*[a-zA-Z]).*[a-zA-Z]$  - first and last character must be alphabet  - accepts single character input  -  it wont allow any special character and white space at start and end   Problem is  - it allows special characters like ...

Hi All,           It may seem trivial, but its getting difficult to deduce what this specific regex expression is doing...                   ^[A-Za-z0-9#,.' ...