Tags: Sharepoint, designer, javascript, validation
Hello, you can put some JS direct in the NewForm.aspx, a copy of it or in a CEWP at the page.
Just add a at the top of the Aspx page, or you can put it in below PlaceHolderMain, (inside the PlaceHolderMain tag).
If you want to read more about validating SharePoint with JS, I recommend Marc D Anderson's blogposts, go there.
© 2012 Created by Christian Ståhl.