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textfield validation

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how will i validate textfield in jsp using javascript..........and also i have to set focus back to textfield if the validation result is wrong......i need an example coding
Jul 23 '08 #1
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when do you want to validate the field ... onsubmit or directly when the value is changed? what do you have so far ... please post at least an example html-code that you want to use, so that we have something to work with ...

kind regards
Jul 23 '08 #2

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