Change an image with onclick()

To change image onclik with javascript you need to have image with id:

<p>
    <img alt="" src="http://www.userinterfaceicons.com/80x80/minimize.png" 
        style="height: 85px; width: 198px" id="imgClickAndChange" onclick="changeImage()"/>
</p>

Then you could call the javascript function when the image is clicked:

function changeImage() {
    if (document.getElementById("imgClickAndChange").src == "http://www.userinterfaceicons.com/80x80/minimize.png"){
        document.getElementById("imgClickAndChange").src = "http://www.userinterfaceicons.com/80x80/maximize.png";
    } else {
        document.getElementById("imgClickAndChange").src = "http://www.userinterfaceicons.com/80x80/minimize.png";
    }
}

This code will set the image to maximize.png if the current img.src is set to minimize.png and vice versa.
For more details visit:
Change image onclick with javascript link