how to remove special character using validation-regex in dct

i want remove special character (#@!$%&*_-;' "\<>~/,?) in dct

scenario is like that............

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i want remove special character (#@!$%&*_-;' "\<>~/,?) in dct

scenario is like that............
<text required="f" maxlength="1000" size="40" validation-regex="^(?=.*[a-z])(?=.*[A-Z])(?=.*[^A-Za-z0-9]).*\$" />

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You would be better off using FormAPI code to handle this - for one, the validation-regex will simply tell you if the value contains / does not contain those characters, it won't strip them out for you. For another, doing the regex's in FormAPI / JavaScript tends to be a lot cleaner.