Author: Twelve Source:
Blue ideal
Today I want to learn the basic knowledge, I have seen HTML (4.0) and found that I have too little to HTML. Many code is very strange, I have never seen it, let alone. Take the element to give an example. Its properties are:
Name, Href, Target, Title (this is usually used, you don't have to say more)
REL, REV, CHARSET, HREFLANG, TABINDEX, AccessKey, Shape (Default | Rect | Circle | Poly), Coords (Length-List) These have been basically rare, and it is introduced here.
Rel = cdate
This attribute points out the relationship from the current location to the link location. For example, Rel = "next" href = "a" pointed out that this link is the next one.
REV = CDATE
This property is just the opposite of REL, no more.
Charset = cdate
This property specifies the encoding method of the link. The attribute value must be the name specified as "charset" in [RFC2O45]: "Euc-JP". The default value of this property is "ISO-8859-1".
hreflang = languagecode
This attribute is used to specify the language used by the link. For example: "en" refers to English, "CN" refers to Chinese.
TabINDEX = Number
This attribute is used to specify elements to get the order of focus. Its value can be any one from 0 to 32767.
In the element of the TabINDEX property, the more priority of the smaller numbers is obtained, and when there is equivalent, the element is first displayed first in the HTML document. A "tabindex = 0" or elements without TabINDEX properties will be accessed last. (Look this, I suddenly remembered whether there is this value to control the page download elements, but I don't know if this idea is correct, it seems that this property is not supported).
AccessKey = Character
This property assigns a hotkey to an A element. A hotkey is a single character from the client browser current character set. The client browser should treat this property as the case.
Shape = default | Rect | Cirle | POLY
This attribute is used to establish a client image image, which specifies the shape of the area, the possible value is:
Default: Define this area
RECT: Define a rectangular area
Circle: Define a circular area
Poly: Define an ellipse area
Default Shape value RECT
Coords = Length-List
This attribute is used to establish a client image image, which specifies a shape on the screen, and the numbers and values of the value depends on the defined shape. Possible combinations are:
RECT: LEFT-X, TOP-Y, RIGHT-X, BOTTOM-Y
Circle: Center-x, Center-Y, Radius
Poly: X1, Y1, X2, Y2 ... XN, YN
The coordinates are linked to the top left corner of the features, all values are length (can be pixel or percentage)
