Download the following file
Lake.class
Download the following picture (or another and change the parameters)
dusk.JPG
Put the following code into your document
<applet code=Lake.class id=Lake width=392 height=380 >
<param name=image value="dusk.JPG">
<param name=overlay value="laptop.gif">
<param name=href value="http://www.javascriptkit.com">
</applet>
Change the overlay value to the name of your picture