How to create validations on exit a page item?

Hi all,
I need to validate a field on exit it and not when click a button. Is it possible in apex?
Thanks
bsalvador

bsalvador
You didn't state the apex version you are using but assuming your at least on version 4 all client side interaction start with Dynamic actions.
These are explained in chapter 17.9 of the Application Express Application Builder User's Guide Release 4.2.
See if using the when condition works for the validations. With an alert as action to notice the user of the error.
The standard when conditions would probably not cover all your needs completely.
Then JavaScript comes into play. Some starting points
For basic javascript
Code academy
Mozilla developer network Getting started tutorial
Specific for APEX documentation for the javaScript API
And since APEX uses jQuery the jQuery learning centre.
An other approach when you're on APEX 4.1+ have a look at the following plugin Live Validation
This plugin supports a number of validation types with out the need of any programming. Check out the list of supported validation types here.
Nicolette

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<Moderator Message: use lower case letters next time, we don't want you to shout. --> see rules of engagement>
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