Firefox:Dive Into Greasemonkey/4.5. Doing something for every instance of a specific HTML element

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4.5. 操作特定 HTML 元素的所有实例

有时您需要操作页面中特定HTML元素的所有实例。例如您要改变所有<textarea>的字体大小。最简单的办法就是调用 getElementsByTagName('tagname') ，它返回您可遍历的这种元素的全集。

例: 查找页面上的所有 textarea

var allTextareas, thisTextarea;
allTextareas = document.getElementsByTagName('textarea');
for (var i = 0; i < allTextareas.length; i++) {
    thisTextarea = allTextareas[i];
    // do something with thisTextarea
}

您不应该使用这个模式来操作页面中的所有链接，因为<a>元素也可以作为页面内的锚。要知道如何查找页面中所有的链接，请查看操作所有具有特定属性的元素。

实例

Zoom Textarea (http://diveintogreasemonkey.org/download/zoomtextarea.user.js)

← 操作所有 HTML 元素

操作所有具有特定属性的元素 →

Strict Standards: Non-static method Namespace::getUser() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 510

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::isTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1367

Strict Standards: Non-static method Namespace::getTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1387

Strict Standards: Non-static method Namespace::isTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 99

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1437

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1439

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1439

Strict Standards: Non-static method Namespace::getImage() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1505

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getUser() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 775

Strict Standards: Non-static method Namespace::getTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 776

Strict Standards: Non-static method Namespace::getUser() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 776

Strict Standards: Non-static method Namespace::isTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 99

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Title::makeTitle() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 718

Strict Standards: Non-static method Title::makeName() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 138

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be assigned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 718

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 900

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getUser() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 510

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::isTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1367

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Strict Standards: Non-static method Namespace::isTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 99

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1437

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1439

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1439

Strict Standards: Non-static method Namespace::getImage() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1505

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

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Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

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Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getUser() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1023

Strict Standards: Non-static method Namespace::getTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1024

Strict Standards: Non-static method Namespace::getUser() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1024

Strict Standards: Non-static method Namespace::isTalk() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 99

Strict Standards: Non-static method Namespace::getSpecial() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/languages/Language.php on line 1456

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1450

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Non-static method Title::newFromText() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

Strict Standards: Non-static method Namespace::getCanonicalIndex() should not be called statically, assuming $this from incompatible context in /home/mozcn/html/mediawiki-1.3.18/includes/Title.php on line 695

Notice: Only variable references should be returned by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Namespace.php on line 138

Strict Standards: Only variables should be passed by reference in /home/mozcn/html/mediawiki-1.3.18/includes/Skin.php on line 1452

取自"http://wiki.mozcn.org/index.php/Firefox:Dive_Into_Greasemonkey/4.5._Doing_something_for_every_instance_of_a_specific_HTML_element"

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