标签： !DOCTYPE html html lang="en" head meta charset="UTF-8"
标签：
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<title>JSDom获取图层节点</title>
</head>
<body>
<script type="text/javascript">
function getUsername() {
var dom=document.getElementById("username");
var name=dom.value;
alert(name);
}
</script>
<input type="text">
<input type="button" value="获取用户名">
</body>
</html>
JS的dom获取用户名
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