Saturday, July 25, 2015

22. HTML Forms

8:41 AM Unknown No comments
HTML Tutorial

TML Forms are required when you want to collect some data from the site visitor. For example during user registration you would like to collect information such as name, email address, credit card, etc.
A form will take input from the site visitor and then will post it to a back-end application such as CGI, ASP Script or PHP script etc. The back-end application will perform required processing on the passed data based on defined business logic inside the application.
There are various form elements available like text fields, textarea fields, drop-down menus, radio buttons, checkboxes, etc.
The HTML
tag is used to create an HTML form and it has following syntax:

 action="Script URL" method="GET|POST">
    form elements like input, textarea etc.

Form Attributes

Apart from common attributes, following is a list of the most frequently used form attributes:
AttributeDescription
actionBackend script ready to process your passed data.
methodMethod to be used to upload data. The most frequently used are GET and POST methods.
targetSpecify the target window or frame where the result of the script will be displayed. It takes values like _blank, _self, _parent etc.
enctypeYou can use the enctype attribute to specify how the browser encodes the data before it sends it to the server. Possible values are:
  • application/x-www-form-urlencoded - This is the standard method most forms use in simple scenarios.
  • mutlipart/form-data - This is used when you want to upload binary data in the form of files like image, word file etc.
Note: You can refer to Perl & CGI for a detail on how form data upload works.

HTML Form Controls

There are different types of form controls that you can use to collect data using HTML form:
  • Text Input Controls
  • Checkboxes Controls
  • Radio Box Controls
  • Select Box Controls
  • File Select boxes
  • Hidden Controls
  • Clickable Buttons
  • Submit and Reset Button

Text Input Controls

There are three types of text input used on forms:
  • Single-line text input controls - This control is used for items that require only one line of user input, such as search boxes or names. They are created using HTML tag.
  • Password input controls - This is also a single-line text input but it masks the character as soon as a user enters it. They are also created using HTMl \ tag.
  • Multi-line text input controls - This is used when the user is required to give details that may be longer than a single sentence. Multi-line input controls are created using HTML
This will produce following result:
Description :

Attributes

Following is the list of attributes for
Posted in: ,,

0 comments:

Post a Comment

 
Designed by Kakada Akkarak Surakkiat
Technology: របៀប​ដំឡើង Windows 10 នៅ​លើ​កុំព្យូទ័រ!: អ្នកត្រូវដឹងឲ្យ ច្បាស់ពី Windows ដែលអ្នកយក ទៅដំឡើង ដោយសារមាន Windows ខ្លះមានការ crack រួច ឬខ្លះត្រូវការ Product key ភ្លាម និងខ្លះទៀត អាចត្រូវ skip កន្លែងវាយលេខ Product key បាន តែត្រូវ Activate តាមក្រោយ ទើបប្រើប្រាស់បាន។ Technology: ដំណោះ​ស្រាយ Error 80240020 នៅ​ពេល​តម្លើង Windows 10 Free តាម​រយៈ​ការ Upgrade : មាន បញ្ហាមួយចំនួន ទាក់ទងនឹង ការតម្លើង Windows 10 នេះផងដែរ ប៉ុន្តែបញ្ហានោះ កើតឡើង ទៅលើតែកុំព្យូទ័រ មួយចំនួនប៉ុណ្ណោះ គឺខណៈពេល ដែលអ្នក ប្រើប្រាស់ បានទាញយក Windows 10 ចប់ហើយ វាបាន បង្ហាញនូវ ផ្ទាំង error មួយ ដែលមានលេខ សំគាល់ error នោះគឺ 80240020។ ដូចនេះដើម្បី ដោះស្រាយ នូវបញ្ហា មួយនេះ សូមលោកអ្នក តាមដានអាន ជាមួយយើងខ្ញុំ ទាំងអស់គ្នា !!