Creating master or common menu in html only website

Html does not have master page like feature, so you might end up creating menu on each page.
But with help of javascript you can  do a work arround

Paste your menu code in seperate file and do next after the DOM load

$(document).ready(function () {
    //adds Main-manu.html content into any "#MainMenu" element
    $('#MainMenu').load('Main-manu.html'); 
});