how to render image using js dom code example

Example 1: js get image src

var youtubeimgsrc = document.getElementById("youtubeimg").src;

Example 2: insert image using set atribute

var img = document.getElementById("example");
console.log(img.getAttribute("src")); // "images/foo.png"
console.log(img.src);                 // "http://example.com/path/images/foo.png"