Working on a custom bwhud

http://imgur.com/a/xvokC

It doesn't work at all

Hello,
Yesterday, I tried the broesel crosshair switcher just for viewmodels. By the way, I wondering if it's possible to keep the sticky launcher, use mouse1 as +attack and switch to the grenade launcher only when i'm using the slot1 or the slot3 (I use mouse5 for switch and attack with the slot3.)

So, there is my demoman.cfg:

bind mouse1 "+prim" 
bind mouse2 "+secd"
bind mouse5 "+mel"

alias +prim "slot1;+attack"
alias -prim "-attack"
alias +secd "+attack2"
alias -secd "-attack2"
alias +mel "slot3;+attack"
alias -mel "-attack"
alias +prim "slot1;r_drawviewmodel 0; +attack"
alias +secd "r_drawviewmodel 1; +attack2"
alias +mel"slot3;r_drawviewmodel 1; +attack"

So I would like to know if a command like "If" exist for cfg.
Or a way to replace this line:

alias +prim "slot1;r_drawviewmodel 0; +attack"

by something like this:

alias +prim exept "slot2"

Thanks.

Awesome HUD. Nice work