Syntax
document.links[num].pathname
The pathname property contains the path of the file specified in the URL, including the leading slash (/). This property is a read/write string.
<html>
<body>
<form name="question">
<input name="carType"
type="radio"
checked
onClick="updateLinks('A')">A<br>
<input name="carType"
type="radio"
onClick="updateLinks('B')">B
</form>
<map name="java2sMap">
<area name="car"
coords="1,1,48,48"
href="http://www.java2s.com"
target="_top">
</map>
<img src="http://www.java2s.com/style/logo.png" align="top"
height="50" width="50" usemap="#java2sMap">
<hr>
<script language="JavaScript">
<!--
function updateLinks(car)
{
if(car=="A")
document.links[0].pathname="/index.html";
if(car=="B")
document.links[0].pathname="/index.html";
}
-->
</script>
</body>
</html>