<html>
<head>
<title>this is title</title>
</head>
<body>
<script type="text/javascript">
alert("dfd");
var firstname= "George";
document.write("Hello World!");
document.write(firstname);
alert("dfd");
document.write("<br/>");
var lastname ="John";
document.write(lastname);
</script>
</body>
</html>javascript【2018.12.01】
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