Thank you for reply.Profile script way worked. With AT.js, simply calling ${profile.paramName} got me its value. Both campaign is on same page. But it is very helpful info that it won't work in different page. Thanks!

We use AT.js and trying to retrieve the value of certain parameter stored in global mbox via concurrent campaign.It seems mbox.js has a method for that, but this page says it does not apply AT.js.https://marketing.adobe.com/resources/help/en_US/target/target/r_variables_profiles_parameters_methods.h...