I also don't think having a javascript function that inserts the Launch code is a supported implementation. More info on how to deploy Launch can be found here

@Zoryana -Each time a value is passed into the getValOnce() plugin, the value stored in the cookie updates. Because of this, each time your cmpid value changes, getValOnce() returns the new value.In the following example, assume that each call to getValOnce() occurs in the order listed, during a single session/visit:omt_s.getValOnce("first_value", "ecmpid", 0) // returns "first_value"omt_s.getValOnce("first_value", "ecmpid", 0) // returns "" because the campaign value ("first_value") has NOT cha...