how to get image from image src in js code example

Example 1: javascript change image src

//change image src
document.getElementById('myImageID').src="images/my_other_image.png";

Example 2: how to set diferent images in html through js

<div id="x"></div>

<script>
var img = document.createElement("img");
 
img.src = "image.png";
var src = document.getElementById("x");
 
src.appendChild(img);
</script>