CODE EXAMPLE FOR JAVASCRIPT

change image onclick js

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