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javascript学习代码

点击改变p和div元素：

<!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=gb2312" />
<title>test javascript</title>
<style type="text/css">
    body{
            margin:0px;
            padding:0px;
            background:#999999;
            }
    #button{
            border-radius:6px;
            color:#00FF00;
            font-size:16px;
            }
</style>
</head>

<body>
<h1>My Site</h1>
<p id="demo">一个段落</p>
<div id="myDIV" onclick="JavaScript:alert("hello lt")">一个div块</div>
<button type="button" id="button" onclick="myFunction()" >click me</button>
<script type="text/javascript">
    function myFunction(){
        document.getElementById("demo").innerHTML="Hello world!";
        document.getElementById("myDIV").innerHTML = "How are you!";
    }
</script>
</body>
</html>

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原文地址：https://www.cnblogs.com/blogofwyl/p/4541485.html