sub pop_user_entry{
        $temp_var = "";
        my $user_entry_done = 0 ;
        my $dialog_top = $mw->Toplevel(-title=>"User Entry");
        $dialog_top->Entry(-textvariable=>\$temp_var)->pack;
        $dialog_top->Button(-text=>"OK",-command=>sub {$user_entry_done = 1 unless($temp_var =~ m/^$/);})->pack;
        $dialog_top->waitVisibility;
        $dialog_top->grab;
        $dialog_top->waitVariable(\$user_entry_done);
        $dialog_top->grabRelease ;
        $dialog_top->destroy;
}