In a recent study IE11 javascript from jscript. DLL analysis function, encounter a problem, see from IDA pseudo code

I'd like to look at the structure of this ArrayObj * a2, but can't find the corresponding information, may be I search method is not correct, so consult everybody, can you explain ArrayObj detailed structure (each migration represents what), best also can say: how can you see in the windbg under this structure, the content of the

Tell me where can I find the corresponding data can also be,