JavaScript 实现网页文字颜色动态切换

<html>
<head>
<title>JS实现让访问者自助选择网页的文字颜色</title>
<script language="javascript">
<!--
 function chColor(c){
 document.body.style.color = c;
 }
//-->
</script>
</head>
<body>
<input name="c" type="radio" value="#000000" onClick="chColor(this.value)" checked>黑
<input name="c" type="radio" value="#0000FF" onClick="chColor(this.value)">蓝
<input name="c" type="radio" value="#FF0000" onClick="chColor(this.value)">红<br>
本行文字会改变颜色哦! 
</body>
</html>