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//usr/lib/perl5/5.8.8/CGI/eg/customize.cgi
#!/usr/local/bin/perl use CGI qw(:standard :html3); # Some constants to use in our form. @colors=qw/aqua black blue fuschia gray green lime maroon navy olive purple red silver teal white yellow/; @sizes=("<default>",1..7); # recover the "preferences" cookie. %preferences = cookie('preferences'); # If the user wants to change the background color or her # name, they will appear among our CGI parameters. foreach ('text','background','name','size') { $preferences{$_} = param($_) || $preferences{$_}; } # Set some defaults $preferences{'background'} = $preferences{'background'} || 'silver'; $preferences{'text'} = $preferences{'text'} || 'black'; # Refresh the cookie so that it doesn't expire. This also # makes any changes the user made permanent. $the_cookie = cookie(-name=>'preferences', -value=>\%preferences, -expires=>'+30d'); print header(-cookie=>$the_cookie); # Adjust the title to incorporate the user's name, if provided. $title = $preferences{'name'} ? "Welcome back, $preferences{name}!" : "Customizable Page"; # Create the HTML page. We use several of Netscape's # extended tags to control the background color and the # font size. It's safe to use Netscape features here because # cookies don't work anywhere else anyway. print start_html(-title=>$title, -bgcolor=>$preferences{'background'}, -text=>$preferences{'text'} ); print basefont({SIZE=>$preferences{size}}) if $preferences{'size'} > 0; print h1($title),<<END; You can change the appearance of this page by submitting the fill-out form below. If you return to this page any time within 30 days, your preferences will be restored. END ; # Create the form print hr(), start_form, "Your first name: ", textfield(-name=>'name', -default=>$preferences{'name'}, -size=>30),br, table( TR( td("Preferred"), td("Page color:"), td(popup_menu(-name=>'background', -values=>\@colors, -default=>$preferences{'background'}) ), ), TR( td(''), td("Text color:"), td(popup_menu(-name=>'text', -values=>\@colors, -default=>$preferences{'text'}) ) ), TR( td(''), td("Font size:"), td(popup_menu(-name=>'size', -values=>\@sizes, -default=>$preferences{'size'}) ) ) ), submit(-label=>'Set preferences'), hr; print a({HREF=>"/"},'Go to the home page'); print end_html;