Hi,
You can add a custom control on your master pages or pages that will add the js code you want. Another option is using Generic Content control.
It would not be possible to add js code without editing a master page( template) or a page.
You can add some code to all pages if you inherit from the base page class - InternalPage, but this depends on results you want to have.
Greetings,
Ivan Dimitrov
the Telerik team
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