Detecting if a player jumped

[EFEX03]

Hey guys I am making a stamina system and am trying to detect if a player jumped. I had tried to see if the key is down, but if you hold down space bar my stamina will just drain. I only want it to drain when a successful jump is executed. If anyone can help me please do and thanks!

if (client:KeyDown( IN_JUMP )) then
if client:getLocalVar("stm", 0) >= 10 then
client:setLocalVar("stm", (client:getLocalVar("stm", 0) - 10))
elseif client:getLocalVar("stm", 0) < 10 then
client:setLocalVar("stm", 0)
end
end

[EFEX03]

Ah ok thanks! Also do you know why the coding format is messed up on Facepunch for me? I see double ends and thenif. It formats oddly :/

[EFEX03]

I actually just fixed it by doing the "ugly wide screen" mode.