volume up and down buttons

[mirianam]

I am very new to Director and lingo especially so bear with me please.
I have a volume icon and a plus and a minus sprite and i want to make
the volume go up incrementally on clicking plus and doown clicking minus

I've put these scripts in:

on startMovie
    global vol
    set vol to 4
    set the soundLevel to vol
end


on  mouseUp
if the soundLevel < 7 then
    set vol to soundLevel
    set vol to vol+1
    set the soundLevel to vol
else
    set the soundLevel to 7
end if
end

for volume [ - ]

on  mouseUp
if the soundLevel > 0 then
    set vol to soundLevel
    set vol to vol-1
    set the soundLevel to vol
else
    set the soundLevel to 0
end if
end

But I get error-
variable used before assigned a value

Can anyone please set me straight? Thanks



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