Question

I have three images: the first is a light switch, the second is an “off” light bulb and the third is an “on” light bulb. When a user clicks on the light switch image, I would like it to change the “off” light bulb image into the “on” light bulb image. Is this possible?

These are the images:

Javascript:

img2=new Image();
img2.src="images/RCS/lightbul2-250.gif";
img3=new Image();
img3.src="images/RCS/lightbuld1.gif";

function changeImage() {
    document.getElementById('myImage').src=img2.src;
}
function changeImage2() {
document.getElementById('myImage').src=img3.src;
}

HTML:

<img id="myImage" onmouseover="changeImage()" onmouseout="changeImage2()" border="0" width="250" height="141" src="images/RCS/lightbulb1-100.gif">

Answer 1

You can also achieve this without JQuery by using if/else statements.

HTML Markup:

<a href="#" onClick="changeImage()"><img src="lightSwitch.jpg"></a>
<img id="myImage" src="lightOff.jpg">

Javascript:

function changeImage() {
    if(document.getElementById('myImage').src == 'lightOff.jpg') {
        document.getElementById('myImage').src = 'lightOn.jpg';
    } else if(document.getElementById('myImage').src == 'lightOn.jpg') {
        document.getElementById('myImage').src = 'lightOff.jpg';
    }
}

JS Fiddle Example