how to embed pdf file in as3 in flash

I have 3 button horizontally like    1          2            3

when i click on 1 it will go left and open corresponding pdf in left side like 

  1

  2          1's data(pdf file)

3

if i click on 2 it will be like   

2

3     2's data(pdf file)

1

same for 3

after generating swf i hav 2 embed it in html.

so i want 2 know how to embed corresponding pdf in fla file using as3?