Hide the main menu

Hi all, 

my question is simple, how can i hide the main menu please ? On my default template, it called #pillmenu (in #user3) but when i put "#pillmenu: display:none;" or same with #user3 in the mj_iphone.css, the menu is still displaying, why ?

Thanks,

make sure that you do not delete or 'Trash' the main menu as it contains the 'Home' file which provides the configuration details for the front page formatting for the website. In fact removal will mean that the site becomes inaccessible and any attempt to get in from a browser using the main website URL will mean a 404 page being displayed .

If you do not wish to see the Main Menu on your website, try using the following setting on your Joomla website:

Extensions>Module Manager>'select' Main Menu>Menu Assignment>'select' None