Custom Page insertion via javascript

I have been tooling around with javascript to insert pages.
 
Experimenting with either
 
this.insertPages({nPage:1,
cPath:"InsertExampleSource.pdf",
nStart:2 });
 
OR
 
this.insertPages({nPage:0,
cPath:"InsertExampleSource.pdf",
nStart:2,
nEnd:3 });
 
What I am attempting to do is merge two pdf documents and have the pages from the second document follow every other page from the first.
Is this realistic?
 
EXAMPLE:
PDF A has 5 pages
PDF B has 5 pages
 
A1
A2
A3
A4
A5
 
B1
B2
B3
B4
B5
 
After Merge:
 
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5