#include < amxmodx >
    #include < cstrike >

    public plugin_init( )
    {
        register_plugin( "Block jointeam", "0.1", "Exolent" );
    }

    public client_command( client )
    {
        static const szJoinCommand[ ] = "jointeam";

        static szCommand[ 10 ];
        read_argv( 0, szCommand, 9 );

        if( equal( szCommand, szJoinCommand )
        && CS_TEAM_T <= cs_get_user_team( client ) <= CS_TEAM_CT )
        {
            console_print( client, "You cannot use jointeam while on a team!" );
            return PLUGIN_HANDLED;
        }

        return PLUGIN_CONTINUE;
    }