JavaScript实现点击Radio切换网页背景色

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>radio颜色选择器</title>
<body>
<FORM METHOD="POST" NAME="bgcolor">
<font color="silver">click here</font><input type="radio" name="bgcolor" ONCLICK="document.bgColor='silver'"><BR>
<font color="lightslategray">click here</font><input type="radio" name="bgcolor" ONCLICK="document.bgColor='lightslategray'"><BR>
<font color="azure">click here</font><input type="radio" name="bgcolor" ONCLICK="document.bgColor='azure'"><BR>
<font color="lightgreen">click here</font><input type="radio" name="bgcolor" ONCLICK="document.bgColor='lightgreen'"><BR>
<font color="lightblue">click here</font><input type="radio" name="bgcolor" ONCLICK="document.bgColor='lightblue'"><BR>
<font color="white">click here</font><input type="radio" name="bgcolor" ONCLICK="document.bgColor='white'"><BR>
</form>
</body>
</html>