integratig functions

I have 4 functions which are changing four different parameters by sliders. But when i change them one after another every parameter is changing without including 3 left. I 've added a function UpdateImage which will read the current value of each slider. Then have all sliders just call that function whenever they change. But i have some errors. Can someone help? Here is the code:

[code]

T1

T2

a1

a2
[/code]

That’s JavaScript, not PHP…

It might be helpful if you told us what errors you’re getting?

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