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Document.forms

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

<!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

var selectForm = document.forms[index];
var selectFormElement = document.forms[index].elements[index];

規範

Specification Status Comment
WHATWG HTML Living Standard
The definition of 'Document.forms' in that specification.
Living Standard  
Document Object Model (DOM) Level 2 HTML Specification
The definition of 'Document.forms' in that specification.
Recommendation Initial definition.

參見

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