Toggle image src attribute using Javascript

Question

I am trying to change the HTML image src using Javascript. I have two images Plus.gif and Minus.gif.I have inserted HTML img tag and have written a

Answer 1

One way would be to add a toggle variable in your function:

var toggle = false;
function chngimg() {
    if (toggle === true) {
        document.getElementById('imgplus').src  = 'Images/Minus.gif';
    } else {
       document.getElementById('imgplus').src = 'Images/Plus.gif';
       alert(img); 
    }
    toggle = !toggle; 
}

---

Note that it's a better practice to use a sprite for this kind of thing. If you're using two images, the user experience is going to be clunky, because the first time they click the image, there will be a slight delay while the second image loads.

Ideally you would have the two images as a sprite sheet, and be using JQuery. Then you could just do it like this.

HTML

CSS

#imgplus .clicked { background-position: 0 -30px; }

Javascript

function chngimg() {
    $("#imgplus").toggleClass("clicked");
}