Make a .cfg named bunnyhop and save it to your cstrike folder
and in bunnyhop you type:

bind "SPACE" "+bhop"
bhop "alias _special"
alias @bhop "speci
alias +bhop "alias _special @bhop;@bhop"
alias 
-al;wait;+jump;wait;-jump"
Then you open your userconfig or config and type:
exec bunnyhop.cfg
Finish!