1. Web standards
1.1 structure
(1)xhtml (Extensible Hypertext Markup language) Extensible Hypertext Markup Language
(2)W3C (world wide web consortium) World Wide Web Consortium
a, formulated the structure ( xhtml, xml), performance (css), standards.
1.2 Performance
(1) css (cascading style sheets) cascading style sheets
1.3 Behavior
(1) ECMA (Europan Computer Manufactures Association) European Computer Manufacturers Association
a, formulated the behavior DOM (Document Object Model) text object model
b, ECMAscript standard
2. HTML basic structure
<!doctype html>
<html>
<head>
<meta charest="utf-8"> <!--编码格式-->
<title></title>
</head>
<body>
<h1></h1> <!--标题-->
.
.
.
<h6></h6>
<p></p> <!--段落-->
</body>
</html>3. Basic syntax
3.1 General tags
is as follows:
/> & lt; br/& gt; & lt;!-Change-& gt;
4. Common tags (labels)
4.1 List
a, ordered list
<ol> ordered <li></li> <li></li> <li></li> </ol>
b, unordered list <ul> unordered
<li></li>
<li></li>
<li></li>
</ul>
c, custom list
<dl> definition list <dt>被解释</dt> <dd>解释</dd> definition description </dl>
Note: dd can be repeated, but dt Only one is allowed;
Parameters style="A", start="3" in the ordered list, //The first sequence starts from C. 4.2 Picture Tags4.3 Hyperlink
The path is divided into: absolute path (https//www.baidu.com), relative path such as (images/inder.html).
target The default attribute value is _Self; _blank to open the new window
4.4 label
Instructions: A. Automatically exchange between blocks
B. If P block is limited to wide and high, the content is in Chinese, automatic change; if it is English does not wrap lines and will overflow.
Note: a. There is no line break between span blocks. The width and height cannot be limited and change with the length of the text.
4.5 Table tag
1. Syntax:
tr>
t;
3. Cell merge attributes
colspan Merge columns
rowspan Merge rows
Syntax: rowspan="3" //Merge three rows
4. Form
a, form box Syntax:
Description:
c, password box
d, radio button
as follows:
Male
Female
e, multiple check box
Mate selection criteria
185
黑
male
Northeast
disabled="disabled"(disabled, disabled)
checked="checked"(default selected)
f, reset
(1) (Reset, clear the data filled in above)
g, button
(1)
(2)
Note: When the button is used as a label> ;Both jump and submit
h, drop-down list
(1)
i, text field
Note:
(1) The above text box is placed in the form;
(2) What is the difference between post/get attribute value of attribute method in form?
a. Get is to obtain data from the server, and post is to transmit data to the server;
b. Get is to add the parameter value to the URL pointed to by the attribute of the Action that submits the form. The value corresponds to each field in the form. , can be seen in the URL,
Post is through HTTP, the post mechanism places each field in the form and its content in the HTML HEADER and transmits it to the URL address of the ACTION attribute. The user cannot see this process.
c. For the get method, the server-side ReqestQueryString obtains the value of the variable. For the post method, the server uses Request.Form to obtain the submitted data.
d. The data transmission volume of get is small and not more than 2kb. The transmission volume of post is large and generally unrestricted.
f. The security of get is low, but the security of post is high, but the transmission efficiency is high
(3) How to use value in input
a. type="button"/"reset"/"submit"; represents the text on the button
b. type="text"/"password"; represents the initial value
c. type="check"/"radio" Definition and input related values
(4) Form nesting
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