<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>className属性</title>
<style>
body{ font-size:16px;}
.one{
border:1px solid #eee;
width:230px;
height:50px;
background:#ccc;
color:red;
}
.two{
border:1px solid #ccc;
width:230px;
height:50px;
background:#9CF;
color:blue;
}
</style>
</head>
<body>
<p id="p1" > JavaScript使网页显示动态效果并实现与用户交互功能。</p>
<input type="button" value="添加样式1" onclick="add()"/>
<input type="button" value="添加样式2" onclick="acc()"/>
<p id="p2" class="one">JavaScript使网页显示动态效果并实现与用户交互功能。</p>
<input type="button" value="更改外观1" onclick="modify()"/>
<input type="button" value="更改外观2" onclick="modifa()"/>
<script type="text/javascript">
function add(){
var p1 = document.getElementById("p1");
p1.className="one";
}
function acc(){
var p1 = document.getElementById("p1");
p1.className="two";
}
function modify(){
var p2 = document.getElementById("p2");
p2.className="two";
}
function modifa(){
var p2 = document.getElementById("p2");
p2.className="one";
}
</script>
</body>
</html>
后面精简一下：
<script type="text/javascript">
function add(){
document.getElementById("p1").className="one";
}
function acc(){
document.getElementById("p1").className="two";
}
function modify(){
document.getElementById("p2").className="two";
}
function modifa(){
document.getElementById("p2").className="one";
}
</script>
没毛病老铁，做的不错
++1