page http://preistrend.de/ doesn't work properly: web form!

["Clemens Fischer" <ino-qc@xxxxxxxxxxxxxxxxxxxxxx>]

Dear Bug Team!

i found the page http://preistrend.de/ which doesn't work properly.
there's a search-form on it which works in pure w3m, lynx and elinks,
but to my surprise not in emacs-w3m.

the page is in german, but the form is (english) HTML and many items
are just brand-names of technical equipment.

if you can spare the time, i would like you to have a look at the
page to find out why it is unusable in emacs-w3m only, and of course
fix it.

================================================================

System Info to help track down your bug:
---------------------------------------
emacs-w3m-version
 => "1.3.126"
emacs-version
 => "GNU Emacs 21.3.50.1 (i386-unknown-freebsd4.3, X toolkit, Xaw3d scroll bars)\n of 2002-11-22 on spotteswoode.dnsalias.org"
mule-version
 => "5.0 (SAKAKI)"
system-type
 => berkeley-unix
w3m-version
 => "w3m/0.3.2.2"
w3m-type
 => w3m
w3m-compile-options
 => ("lang=en" "image" "color" "mouse" "sysmouse" "menu" "cookie" "ssl" "ssl-verify" "external-uri-loader" "w3mmailer" "nntp" "gopher" "alarm" "mark")
w3m-language
 => nil
w3m-command-arguments
 => nil
w3m-command-arguments-alist
 => nil
w3m-command-environment
 => nil
w3m-use-mule-ucs
 => nil