A report on JavaScript and Form (HTML)

Sample form. The form is enclosed in an HTML table for visual layout.
Registration form of PHP-based e-commerce web-shop software ZenCart

These tasks used to be handled with JavaScript, but had become so common that support for them was added to the standard.

- Form (HTML)

Validating input values of a web form before the data is sent to a web server.

- JavaScript

3 related topics with Alpha

Overall
Example of DOM hierarchy in an HTML document

Document Object Model

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Cross-platform and language-independent interface that treats an XML or HTML document as a tree structure wherein each node is an object representing a part of the document.

Cross-platform and language-independent interface that treats an XML or HTML document as a tree structure wherein each node is an object representing a part of the document.

Example of DOM hierarchy in an HTML document
WHATWG DOM

The history of the Document Object Model is intertwined with the history of the "browser wars" of the late 1990s between Netscape Navigator and Microsoft Internet Explorer, as well as with that of JavaScript and JScript, the first scripting languages to be widely implemented in the JavaScript engines of web browsers.

Form, link and image elements could be referenced with a hierarchical name that began with the root document object.

Dynamic web page: example of server-side scripting (PHP and MySQL).

Dynamic web page

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Web page whose construction is controlled by an application server processing server-side scripts.

Web page whose construction is controlled by an application server processing server-side scripts.

Dynamic web page: example of server-side scripting (PHP and MySQL).
When a request to a dynamic web page or resource is made, the application server processes the request using its server-side language.

A client-side dynamic web page processes the web page using JavaScript running in the browser as it loads.

Using server-side scripting to change the supplied page source between pages, adjusting the sequence or reload of the web pages or web content supplied to the browser. Server responses may be determined by such conditions as data in a posted HTML form, parameters in the URL, the type of browser being used, the passage of time, or a database or server state.

The usap.gov website

Website

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Collection of web pages and related content that is identified by a common domain name and published on at least one web server.

Collection of web pages and related content that is identified by a common domain name and published on at least one web server.

The usap.gov website
The nasa.gov home page in 2015
Server-side programming language usage in 2016.

Dynamic sites can be interactive by using HTML forms, storing and reading back browser cookies, or by creating a series of pages that reflect the previous history of clicks.

Dynamic HTML uses JavaScript code to instruct the web browser how to interactively modify the page contents.