Please find the below related code that short the drop down value. In this , I want to Set 'None' as selected in dropdown when page get load initially,

 
 my %folderMapFinal;
     #print $q->header;
   print "Content-type: text/plain\n\n";
    print "Content-type: text/html\n\n";
foreach my $folderMap (sort keys %folderhash) {
print STDERR "INSIDE FOR LOOP FOR FOLDERMAP\n";
%folderMapFinal =$folderMap;
printf "%-8s %s\n\n", $folderMap, $folderhash{$folderMap};
}


    $q->div( { -class => "text" }, "Folder Name* : ",

    #my $defaultVal ='0',
    $q->popup_menu( -name=>'foldernameval', -id=> 'folder_name_id',
                      -onChange => 'getReportName()',
                      -type=>'dropdown',
                      #-values=> \%folderhash,
                      -values=> \%folderMapFinal,
                      #-default=>$defaultVal,
                      -default=>['0'],
                    ),
    $q->hidden( -name => ('folder_name', -id=> 'h_folder_name_id', -va
+lue => '' )),
    #$q->a( { -href => "signoff.cgi?rm=view_report&fId=3", -onClick =>
+ 'setFolderNameId()',  -title => "Populate Report Name" }, "Populate 
+Report Name" ),
    ),$q->end_div,

    $q->br,
    $q->br,

    $q->div( { -class => "text" }, "Report Name* : ",


    $q->popup_menu( -name=>'reportnameval', -id=> 'report_name_id',
                     -onchange => 'setReportId()',
                      -type=>'dropdown',
                      -values=> \%reportHash,
                      -default=>['0'],
                    ),
    $q->hidden( -name => ('report_name', -id=> 'h_report_name_id', -va
+lue => '' )),
    #$q->a( { -href => " ", -onClick => 'setFolderNameIdInURL()',  -ti
+tle => "Populate Report Name" }, " Click here to Populate Report Name
+" ),
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