Why validate with ASP.NET Validators?

[FellReono]

I'm making my first real ASP page and I need to validate a time of day in 14 different text box fields (both that there is a value present and that the value is ultimately between 0:00:00-23:59:59). I was thinking it would be much easier to write a validation function and then explicitly call it at some point (i.e. when a user hits "submit", or in the TextChanged event handler) instead of adding in either 14 custom validators or 14 range (or RegEx) validators and 14 required field validators. I figure the validators must exist for a reason, but using them to validate in this context looks like doing substantially more work than not using them and I can't see any advantage to justify it.Is there an advantage to the ASP.NET validators that I'm not seeing? Making 14 copies of the same validator in the ASP markup just doesn't seem like a good solution.