Call this method before calling the erload:System.Web.UI.ClientScriptManager.RegisterClientScriptInclude method to avoid registering duplicate scripts. This is particularly important if the script requires a large amount of server resources to create.

A client script include is uniquely identified by its key and its type. Scripts with the same key and type are considered duplicates.

This overload of the erload:System.Web.UI.ClientScriptManager.IsStartupScriptRegistered method calls the overload that takes both a key and a type parameter with the type set as a System.Web.UI.Page object.