tryjsref_submit_form 在线代码实例

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运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
<script>
function displayResult(){
    var x=document.getElementById("submit1").form.id;
    alert(x);
}
</script>
</head>
<body>
<form id="form1">
Email: <input type="text" id="email">
<input type="submit" id="submit1">
</form>
<button type="button" onclick="displayResult()">显示所属表单的ID</button>
</body>
</html>
 
 
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运行结果
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