js set src of img code example
Example 1: javascript change image src
//change image src
document.getElementById('myImageID').src="images/my_other_image.png";
Example 2: javascript check image src
if (img.getAttribute('src') === 'on.png')
Example 3: how to edit image tags in javascript
<a href='#' onclick='edit()'><img src="../template/edit.png" id="edit-save"/></a>