How i can validate a entered text against regular expressions ?

Thank you for reading my post.
how i can validate an entered text to checkk its syntax to ensure that it is a domain name ?
I think i should use RE , but i do not know how i can do this.
Thank you

If you want to validate at client side, you need to create a javascript function (validation) and add it to the "onBlur" attribute of the TextField component In the propertysheet (Set it via JavaScrip->onBlur in the property sheet). To put the Actual Java Script, you need to edit the JSP page. If you need to do it server side, create a custom validator.
http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/customvalidator.html
- WInston
http://blogs.sun.com/winston

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Thanks,
P Prakash
Edited by: prakash on Jul 20, 2011 4:48 AM

Yes as explained in the forum FAQ which you should read
http://forums.oracle.com/forums/ann.jspa?annID=1535
*2. How do I ask a question on the forums?*
SQL and PL/SQL FAQ
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