You would use this basic code to make all your pages. By changing one file, the examplehorizontalmenu_var.js, you can have hundreds of pages using the same menu.
The logo at the top of the screen, which is used on all pages, should have a specific name, e.g. logo.gif. In this sample page I have used "hvlogo.gif". If a different logo is required then you would rename the current file, hvlogo.gif, to oldhvlogo.gif and name the new logo as hvlogo.gif.
If the new logo has a different height then a change to the variables, StartTop and StartLeft, in exampleverticalmenu_var.js. Additionally, the <div style="position:absolute;left:165;top:85"> would have to be changed so the menu "fits" correctly under the logo.gif.