Commented Unassigned: ScriptPath property fot MaskedEditExtender [27981]

in earlier versions, there was a 'ScriptPath' property that i cant attach custom script. I could not find in this version (15.1). How can i tweak this?

Thanks
Comments: You cannot attach a custom script to any particular extender anymore. The only option to add such a script is to embed or reference it manually in page markup.