The bad news is that input validation is difficult. White listing, or identifying all possible strings accepted as input, is nearly impossible for all but the simplest of applications. Black listing, ...

User input validation is an important part of any Web application's navigation flow. There are two peculiar tasks that every Web application performs-check that all required form fields are filled in ...

I need to validate that data entered into a field is numeric.<BR><BR>The html code specifies whether the data being input by the user is numeric or text, I need to make certain that the user can't ...