大佬看一下我这里错那里
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<script type="text/javascript">
var mychar=document.getElementById("z");
document.write("不变"+mychar.innerHTML+"<br />");
mychar.innerHTML="HELLO WORD";
alert("hhdh");
document.write("变"+mychar.innerHTML);
</script>
<body>
<h3>Hello</h3>
<p id="z">I LOVE JAVASCRIPT</p>
</body>
</html>
