Advanced java script

JavaScript has enhanced the simple html pages into more dynamic and interactive web pages. It is very easy to learn as it was designed keeping less experienced programmers in consideration. You can now decorate and design pages, adding real-time functionalities, and visual effects to attract the users with the help of advanced JavaScript.

The internet has a huge number of websites, so for a website to excel these days it has to stand out by using multiple functionalities to boost the speed and smoothen the web experience hence creating a dynamic web page with the help of JavaScript. It is a very small programming language but it is very malleable and flexible as it can be guided very easily for the end result.

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The most common form of JavaScript usage is on the client side. For it to work successfully, it should be added or referenced inside the html code for the browser to present the end result. Writing your script directly into the html is the easiest way to implement the JavaScript.

Also, JavaScript uses it own object model which is inspired by the HTML content of the web page, Which is known as Document Object model (DOM). JavaScript enables the user to see the object and properties inside the web page such as frames, browser window, and status bar etc.

JavaScript can provide many enhanced features such as

Visual effects: This helps in decoration and nowadays Advertising.

Games: Interactive games are so much in demand online nowadays.

Banners: customized banners can help in delivering messages and warning.

Form Validation: Checking on the user details and reverting back with a response.

The major Areas of applications of JavaScript include:

1) Checking the user form entries: it saves time by validating the data types at the client end, rater than sending the data to the server and then validating it.

2) The use of banners and other visual effects requires user input and is displayed instantly with the help of a live script.

Ajax

Ajax (asynchronous JavaScript and XML) comprises of much programming abilities than the name suggests. The simultaneous searching and browsing without the disadvantage of refreshing or reloading the page, it refreshes the data instantly!

It helps in creating highly responsive web application rather than the old sluggish applications which required code submission for every function used.

The functionality of Ajax is much faster than the traditional web application as it tends to rely only on the patch of data with the help of JavaScript, which is needed to generate a response on the following page, rather than waiting for the data and recreating the entire page with refreshed data in the traditional web applications.

Some very good examples which made this partial page updating web application (Ajax) expand its usage are web-based email applications. Google maps too helped in presenting one of the usages of Ajax.

Ajax uses by default uses XMLHttpRequest (XHR) object instead of the older objects like image requests, inline frames, and the script tag. This also plays as a disadvantage as not all devices and browser supports this functionality.