my $rb1 = $frame->Radiobutton(
	-variable=>\$output_select,
	-value=>'netlist',
	-text=>'Generate Netlist',
) ->pack(-side=>'left');

my $rb2 = $frame->Radiobutton(
	-variable=>\$output_select,
	-value=>'template',
	-text=>'Generate Template',
) ->pack(-side=>'right');