Execute a script on enablement

[ivailopankow]

Hy folks, I want to be able to run scripts when the page is already loaded and I enable a specific script.
Example use-case: I have a site that allows me to enter various search criteria. I have two scripts saved and disabled for specific searches. Sometimes I want to. execute the first script/search and at other time I want to execute the second one.
Is there a way for these scripts to be executed on activation?

Thanks

[derjanb]

I think

// @run-at context-menu

is what you're looking for. -> http://tmnk.net/docs#meta:run_at