Programmatically change the src of an img tag

Question

How can I change the src attribute of an img tag using javascript?

Answer 1

With the snippet you provided (and without making assumptions about the parents of the element) you could get a reference to the image with

document.querySelector('img[name="edit-save"]');

and change the src with

document.querySelector('img[name="edit-save"]').src = "..."

so you could achieve the desired effect with

var img = document.querySelector('img[name="edit-save"]');
img.onclick = function() {
    this.src = "..." // this is the reference to the image itself
};

otherwise, as other suggested, if you're in control of the code, it's better to assign an id to the image a get a reference with getElementById (since it's the fastest method to retrieve an element)