restricting <input type="text"> characters?

[Melville]

Is there a way to restrict the data that a user can put into an <input type="text"> box. For example, I would like to restrict the user to digits and "." in a money field.

Thank you,

Mel

P.S. I realize this is an HTML question, not a PHP question, but I find the people in this forum particularly helpful. Thank you all!

[tommynanda]

Combination of onBlur and simple JScript function to check that field shud help you