<html>
<body onload="document.body.link = 'blue';">
<script language="JavaScript"> function function1() {
document.linkColor = "green";
}
</script>
<a href="http://www.java2s.com">java2s.com Web page</a>
<input type="button" value="Change the link color to green" onClick="function1();">
</body>
</html>