{$mosConfig_xxx} placeholder

[startpoint]

Hi,
I have a radiobutton element 'tablename___radio'. He has suboption with value 1 and label

<img src="{$mosConfig_live_site}images/image.png"/>

In form radioelement show image.
In calc element i use this code:

$var = '{tablename___radio}';
return $var;

The result is:

<img src="{$mosConfig_live_site}images/image.png"/>

How to trigger this placeholder in this situation?

 

[startpoint]

Friendly Bump!