HTML, CSS Experience

1, Horizontal center: margin:0 Auto;

And I can't write position:absolute, float:left or anything like that.

2, Repo-broser can see the URL address

3, to re-use the account to log in the time to right---setting---data where all the data is emptied

4, Background-image:url ('.. /images/dd_header_bg.gif ');

5, some pictures were squeezed out because the right margin can float

6, how to vertical in the bottom? : Vertical-align:bottom;?

7, you can use the Margin-top to set the text by the bottom of the alignment

8, Transform:rotatey (180deg), text flip 180 degrees

9, let Li cross up the method is: Float:left;display:inline;  而且背景和文字要在同一层才可以出现浮动效果

10, the center does not need any position or any float content

11, the whole block layout with absolute positioning, local layout with relative positioning!!!!!!!!! Otherwise, the size of the window will cause a layout disorder.

12, border-top-left-radius:4px;
BORDER-TOP-RIGHT-RADIUS:4PX, upper-left corner, upper-right corner set rounded corners

13, Box-shadow Add one or more shadows to the box. This property is a comma-delimited list of shadows, each of which is specified by a 2-4-length value, an optional color value, and an optional inset keyword. The value of the omitted length is 0.

value	Description	Test
H-shadow	Necessary. The position of the horizontal shadow. Negative values are allowed.	Test
V-shadow	Necessary. The position of the vertical shadow. Negative values are allowed.	Test
Blur	Optional. Blur distance.	Test
Spread	Optional. The size of the shadow.	Test
Color	Optional. The color of the shadow. See CSS color values.	Test
Inset	Optional. Changes the outer shadow (outset) to an inner shadow.

14, background-size:100%; do not repeat, tile fill

15, window.open ("open.html", "', ' width=200,height=400 '); Remember the third parameter is to set the width of the high place ~

16, "Computer principle", interface principle

17, an unlimited number of Alu to form a CPU

18.

The ALT attribute is a required property that specifies alternate text when an image cannot be displayed.

Assuming that the user cannot view the image for the following reasons, the ALT attribute can provide alternative information for the image:

• Speed is too slow
• Error in SRC attribute
• Browser Disable image
• The user is using a screen reader

The alt attribute of the tag specifies alternate text for displaying content in the browser instead of an image when the image cannot be displayed or when the user disables the display of the image.

We strongly recommend that you use this property in every image of your document. This way, even if the image is not displayed, users can see some information about what is missing. And for people with disabilities, the ALT attribute is often the only way they understand the content of the image.

19, HTML <dl> <dt> <dd> is a combination of labels, the use of DT DD the outermost layer must use the DL package, this combination tag we also called the Table label, and table table similar to the combination of labels, so name we also called DL table

RAM: Run-time memory (separate physical space?) ）

Cache

Gc

HTML, CSS Experience