html - How to create a fixed element -


enter image description here

as can see in picture, how can make menu tab fixed one?

i tried changing div positioning property fixed, problem gets overlaid on picture. menu part gets screen when tab1 clicked.

i want make menu part fixed , while clicking on menu contents , that : menu 1,2,3, right side content part should change.

i have uploaded files here: link.

use 

position: fixed bottom: 54px; //change want width: 100%; //change want

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