How to add an image in javascript with document.getElementById

Question

How do you make this have a result which is an image, not text

switch(true){
    case (a>b):document.getElementById("result").innerHTML="hey";
                                      break;

Answer 1

If you're adding an image to the DOM

document.getElementById('result').innerHTML = '<img src="path/to/image" />';

If result is an image element

document.getElementById('result').setAttribute('src', 'path/to/image');