Script writers minimize and often change variable names to complex alphanumeric names, basically wanting the script to be the least readable for people, so that no one copies their code / logic, as this can be easily done using firebug and the like things, such scripts can be a real pain for debugging, and there is very little chance that you can figure it out. All the best with the task anyway.
Did you try to debug it if a breakpoint on this available line?
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