You need to request the url used by form to show this result via javascript.
I founded this final url
http://www.ncbi.nlm.nih.gov/sviewer/viewer.fcgi?val=24655740&db=nuccore&dopt=fasta&extrafeat=0&fmt_mask=0&maxplex=1&sendto=t&withmarkup=on&log$=seqview&maxdownloadsize=1000000
Pay attention to use 24655740 from your first link in this request.
You can use cURL.