<html>
<head>
<script>
function writeText(txt)
{
document.getElementById("desc").innerHTML=txt;
}
</script>
</head>
<body>
<img src="/demo/planets.gif" width="145" height="126" alt="Planets" usemap="#planetmap">
<map name="planetmap">
<area shape="rect" coords="0,0,82,126" onmouseover="writeText('The Sun and the gas giant planets like Jupiter are by far the largest objects in our Solar System.')" href="sun.htm" target="_blank" alt="Sun">
<area shape="circle" coords="90,58,3" onmouseover="writeText('The planet Mercury is very difficult to study from the Earth because it is always so close to the Sun.')" href="mercur.htm" target="_blank" alt="Mercury">
<area shape="circle" coords="124,58,8" onmouseover="writeText('Until the 1960s, Venus was often considered a twin sister to the Earth because Venus is the nearest planet to us, and because the two planets seem to share many characteristics.')" href="venus.htm" target="_blank" alt="Venus">
</map>
<p id="desc">Mouse over the sun and the planets and see the different descriptions.</p>
</body>
</html>