Menubar should display only when screen resolution is 800x400 in html,css -


I have a menu bar in the html page, it should only be shown when the screen resolution is 800x400px. How to obtain this: Do not use css3 / css only by using javascript.

You should first put the menu bar Display: Any and then something like that 

  @ Media All and (width: 800 px) and (height: 400 px) {#menubar {display: block; }}

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