At the start checkboxes are checked and images are shown below. When checkbox in not selected the image hides, if checkbox is selected again the image is shows again.
<form action="">
<div>
<input type="checkbox" checked="checked" /> House <br />
<input type="checkbox" checked="checked" /> Car <br />
<input type="checkbox" checked="checked" /> Tree <br />
</div>
</form>
<p>
<img src="house.jpg" alt="House" />
<img src="car.jpg" alt="Car" />
<img src="tree.jpg" alt="Tree" />
</p> <script type="text/javascript">
<!-- function selectImage(checkbox) { var counter = 0 for (var i = 0; i < checkbox.length; ++i) { if (checkbox[i].checked) ++stevec } return counter }
//--> </script>
Car
Tree