Reload connector filters ...

Hi,
I have solution , where are some grids in tabbars . The main grid is in the first tabbar and changing tabbar index I’m reloading related grid with row ID of main grid . All is working OK , except filters , #connector_select_filter . I know that in standard way such filters are filled only once . But it seems that exist solution to reload filter values . Here is discus. :
viewtopic.php?f=2&t=26590&p=84169&hilit=php+distinct#p84169 ( Stanislav answer “Server side filtering” ) . Sorry , but I don’t fully understand how it works and documentation about nothing say … Can you help me , how it can bu used ?
mygrid3._con_f_used[ 3 ] = 2; - what that 2 means ?
mygrid3._colls_loaded = false;

With best regards !

OK , found that the filters renews , then column type is “co” … That’s isn’t comfortable - I’m trying to use only filters , mine column types was “ro” . Now I must to forbid to edit this columns … Hmmm … But what the number means for “_con_f_used” , let me know . At this time for that grid I have 4 filters and 3 of them I want to renew . I did that :

         mygrid3._con_f_used[ mygrid3.getColIndexById( "muit_kod"  )  ] = 4;
         mygrid3._con_f_used[ mygrid3.getColIndexById( "mat_vnt"  )   ] = 4;
         mygrid3._con_f_used[ mygrid3.getColIndexById( "kategorija" ) ] = 4;
         mygrid3._colls_loaded = false;

It seems that all is working …