1. LWP::UserAgent is as a object for browser
2. open url and download captcha, and captcha info wait for input, like $x = <>
3. requirst post to login.
my issue is i can't see the captcha info.
my $url="http://caigou.51book.com/caigou/captcha";
$Lwp->post($url);
open FILE,">abc.jpg" or die "$!";
my $outcome=get ($url);
binmode(FILE);
print FILE $outcome;
.....
$