Post form results click back button and input data erased

[skw]

I have a problem with a form that uses Perl.

If the user misses a form field, in this case, the user misses to select from a drop-down list, clicks submit, the warning page comes up saying "missing data", I click back button, my textarea field box data that has my lengthy input is totally erased!

I've been reading that cookie is the answer but I cannot locate how I set a cookie that'll retain the form field data from the client side and how I specify this cookie in my Perl script that runs my form.

Can someone please help.

 

[abbeman]

Well, how to set and generally handle cookies can be found here:

http://wp.netscape.com/newsref/std/cookie_spec.html