how to change js image src according to input code example

Example 1: how to change image source using javascript

document.getElementById("myImg").src = "hackanm.gif";

Example 2: set img src using javascript

document.getElementById("imageid").src="../template/save.png";

Example 3: how to edit image tags in javascript

<a href='#' onclick='edit()'><img src="../template/edit.png" id="edit-save"/></a>