How do I use parameter in True Client and how do I concatenate 2 strings

Hi,

I wasn't able to understand how to use parameters in True client script.

In addition, please advise on the way to concatenate 2 strings in this protocol. it is so simple in regular javascript (when using web http protocol for example) but so unclear when using True client.

I have to say that the documentation of True client protocol is very limited.

Thanks in advance,

Gadi