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Home Web Front-end JS Tutorial JavaScript introductory tutorial (10) Understanding other objects_Basic knowledge

JavaScript introductory tutorial (10) Understanding other objects_Basic knowledge

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May 16, 2016 pm 06:56 PM
javascript Getting Started Tutorial

anchors[]; links[]; Link 连接对象
用法：document.anchors[[x]]; document.links[[x]]; ;
　　document.anchors 是一个数组，包含了文档中所有锚标记（包含 name 属性的标记），按照在文档中的次序，从 0 开始给每个锚标记定义了一个下标。
　　document.links 也是一个数组，包含了文档中所有连接标记（包含 href 属性的标记和标记段里的标记），按照在文档中的次序，从 0 开始给每个连接标记定义了一个下标。
　　如果一个标记既有 name 属性，又有 href 属性，则它既是一个 Anchor 对象，又是一个 Link 对象。
　　在 IE 中，如果在标记中添加“id="..."”属性，则这个对象被赋予一个标识（ID），调用这个对象的时候只需要使用“”就行了。很多文档部件都可以用这个方法来赋予 ID，但要注意不能有两个 ID 相同。
anchors 和 links 作为数组，有数组的属性和方法。单个 Anchor 对象没有属性；单个 Link 对象的属性见下。

Attributes
protocol; hostname; port; host; pathname; hash; search; href Same as location object.
target Returns/specifies the target window (string) of the connection, which is the same as the target attribute in the tag.
Event
onclick; onmouseover; onmouseout; onmousedown; onmouseup
applets[] Java applet object It is an array that contains all Applet objects (Java applets) in the document ). As an array, there are array properties and methods. Regarding the properties and methods of a single Applet object, I quote: "The Applet object inherits all public properties and methods of the Java applet." (English original sentence: The Applet object inherits all public properties of the Java applet./The Applet object inherits all public methods of the Java applet.) Because I hate Java applets, I am not interested in its "public" and "private" issues, so I have not discussed them.
embeds[] Plug-in object It is an array that contains all the plug-ins ( tags) in the document. Because each plug-in is different, each Embed object also has different properties and methods.
forms[]; Form form object document.forms[] is an array that contains all forms (
) in the document. To reference a single form, you can use document.forms[x], but generally speaking, people will do this: add the "name="..."" attribute to the tag, then use "document. " can be quoted.
Attributes of the Form object
name returns the name of the form, which is the attribute.
action Returns/sets the submission address of the form, which is the attribute.
method Returns/sets the form submission method, which is the attribute.
target Returns/sets the window returned after the form is submitted, that is, the attribute.
encoding Returns/sets the encoding method of form submission content, that is, the attribute.
length Returns the number of elements contained in this form.
Methods
reset() Reset the form. This is the same as pressing the "reset" button.
submit() Submit the form. This is the same as pressing the "Submit" button.
Event
onreset; onsubmit
The following are from "Button" to "Textarea" Is the element object of the form.
Button button object is specified by "". To reference a Button object, you can use "..