Document.forms
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forms
屬性會回傳一個包含目前頁面中所有 <form>
元素的集合物件(型別為 HTMLCollection
)。
語法
collection = document.forms;
範例:取得表單資訊
html
<!doctype html>
<html lang="en">
<head>
<title>document.forms example</title>
</head>
<body>
<form id="robby">
<input
type="button"
onclick="alert(document.forms[0].id);"
value="robby's form" />
</form>
<form id="dave">
<input
type="button"
onclick="alert(document.forms[1].id);"
value="dave's form" />
</form>
<form id="paul">
<input
type="button"
onclick="alert(document.forms[2].id);"
value="paul's form" />
</form>
</body>
</html>
範例 2:取得表單內的元素
js
var selectForm = document.forms[index];
var selectFormElement = document.forms[index].elements[index];
規範
Specification |
---|
HTML Standard # dom-document-forms-dev |