HTML Beginner's Guide (9)

Specifies a link to a QuickTime movie. Some common file types and their extensions:

File type extension
plain text .txt
HTML document.html
GIF image.gif
TIFF image.tiff
X bitmap image. or .mpg

Remember your assumed readers and the software they use. For example, most UNIX workstations cannot play QuickTime movies.

Tables
Before HTML formulated table tags, HTML authors had to be careful in the

 tag Arrange their information in tabular format, count the number of spaces, and preview the output. Tables are not only useful for describing tabular information, but they also make it easy for regular HTML writers to write large amounts of web pages. (See NCSA Relativity Group's pages for a good example.) 

 Consider your tabular information according to the coding explanation below. A table should have headers that describe what each row/column contains, with rows representing the information and cells representing each item. In the table below, One column contains header information, each row describes an HTML table tag, and each unit contains a pair of tags or an explanation of the tag function. 

Table element 
Element description 
 ...  Definition A form. If the BORDER attribute is used, the browser displays a table with a border. 
 ...  defines the caption of the table title. The default position of the title is at the top of the table. The attribute ALIGN=BOTTOM can be used The specified title is displayed at the bottom of the table 
Note: Any other tag can be used within the caption tag. 
 ...  describes a row in the table. You can define the default attribute for the entire row: ALIGN ( LEFT, CENTER, RIGHT) and/or VALIGN (TOP, MIDDLE, BOTTOM). For details, refer to the "Table Properties" section at the end of this table. 
 ...  Define a table header unit. By default, the text of this cell is bold and centered. The cell can contain other attributes that describe the cell properties and/or cell content. See the "Table Properties" section at the bottom of this table for details. 
 ... < ;/TD> Define a table data cell. By default, the text in this cell is left-aligned horizontally and centered vertically. The cell can contain other attributes to describe the cell attributes and/or cell content. For details, see "Table Properties" section at the bottom of this form. 
Table Properties 
Note: Properties defined in  ...  or  ...  cells will override ( override )  ...  Default definition. 
Attribute description 
ALIGN (LEFT, CENTER, RIGHT) 
VALIGN (TOP, MIDDLE, BOTTOM) 
COLSPAN=n 
ROWSPAN=n 
 NOWRAP 
The horizontal position allocation of a unit. 
The vertical position allocation of a unit. 
How many columns a unit spans (n). 
How many rows a unit spans (n). 
Turn off word wrapping in a unit. 


General table format
The general format of a table is: 

 <== The beginning of the table definition
 <== caption definition 

< ;TR> <== The beginning of the first line of definition
 <== The first cell (a head) of the first line
 <== The last unit of the first line (a head)
 <== The end of the definition of the first line
 <== The definition of the second line Start 
 <== The first unit in the second row 
....
 <== The last one in the second row Unit 
 <== The end of the second line of definition 
 <== The beginning of the last line of definition 
 <== The last line of A unit 
... 
 <== The last line of the last unit 
 <== The end of the last line of definition 
 caption content
 Cell content
 Cell content 
 Unit content
 Unit content
 Unit content
 Unit content
 < == End of table definition 
The  and  tags must enclose the entire table. The first item in the table is the CAPTION, which is optional. Then you can define it with the  and  tags Any number of rows. There can also be any number of cells defined within a row using the ... or ... tags. Each row in the table is essentially The top is formatted independently from the rows above and below it. This allows you to easily display tables with only one cell like the one above, such as table attributes, across multiple columns in the table. 

Used by non-tabular information Tables 
 Some HTML authors use tables to describe non-tabular information. For example, because links can be contained within table cells, some authors use tables without borders to combine a number of separate images to create "one" image. Browsers that can display tables These physically separate images can be displayed seamlessly, making the combined image resemble an image map (an image with a rectangular hyperlink area). 

Using tables with image borders also You can get a good display effect. Give it a try and see which style you like. 

Fill-out Forms
Web form allows readers to return information to the Web server to produce some kind of action. For example, Suppose you want to collect names and email addresses in order to send an email to readers who have requested it. For each person who enters his/her name and address, you need to get the information to be sent and add the respondent's item to the database . 

This kind of input data processing is usually done by script (descriptive language: Translator's Note) describing functions or programs written in Perl or other languages ​​​​that process text, files and information. If you can't write For programs or script functions that can process input data, you have to find someone else to do it for you. 

Form itself is relatively simple. They are also generated using HTML tags. The difference may be in the program or script that accepts and processes the submitted data. Description function. Since it is necessary to explain the special script description function that processes input information, filling forms will not be discussed in this guide. 

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