[quote]The point of my question was to find out if it matters in the eyes of the court whether he quit or was laid off. That simple. [/quote]

Yes, it would matter. If he quit, the courts will probably impute income to him (to what he was making in the job he quit)when calculating child support. In other words, if he files for modification based on his lower income and you are able to prove that he voluntarily quit the higher paying job, he's not going to get the child support lowered.