Toggle voice comunication

This script toggle ur talking,when ur in a game and u hold down "K" u can talk in the game BUT sometime ur playing and u have to hold down k to talk(thats very anoyng,coz is hard to play and press k and the same time,with this script u DON'T have to hold down any u just press "K" and is goin to do it for u!!
alias "toggle" "toggle_on" alias "toggle_on" "+voicerecord; alias toggle toggle_off alias "toggle_off" "-voicerecord; alias toggle toggle_on bind "<font color='red'>YOUR BIND KEY</font>" "toggle"