script (HTML4 & HTML5)

Prompt box used for taking input from user. If you click on ok button then it return input value else it return null

The jQuery load method is a simple to use AJAX (Asynchronous JavaScript and XML.) function. That enables you to load ajax content with one line of code. AJAX is a technique for creating better and more interactive web applications and we at webgrid.com are using ajax with jQuery alot to make this web page better!

JavaScript is a client side scripting language that can make your webpage intaractive and JavaScript can be embbeded into your static HTML webpage directly.

Using the css property we can get the simple CSS property value of an attribute.

By extending jQuery, you create reusable components that can be used on any web page. Your code is encapsulated and there is less risk that you will use the same function names elsewhere.

A JavaScript can be a small, embedded program that can add interactivity to your website. For example, a script could generate a pop-up alert box message.

Now HTML 5 came up with a Drag and Drop (DnD) API that brings native DnD support to the browser making it much easier to code up. HTML 5 DnD is supported by all the major browsers like Chrome, Firefox 3.5 and Safari.

With jQuery, you can hide and show HTML elements with the hide and show methods

The <canvas> tag is used to draw graphics, on the fly, via scripting (usually JavaScript). The <canvas> tag is only a container for graphics, you must use a script to actually draw the graphics.

jQuery selectors allows us to select HTML elements and manipute them as a group or as a single object. In jQuery it's common that selectors start with dollar sign and parentheses. Syntax:- $.(selector).methodName();

jQuery is a very powerful tool which provides a variety of traversal methods to help us select elements in a document randomly as well as in sequential method. In other words, we can say that most of the traversing methods are used to find elements from the documents.

Javascript Events are the actions which are detected by the javascript when they are fired.

The HTML5 Geolocation API is used to get the geographical position of a user. NOTE: Since this can compromise user privacy, the position is not available unless the user approves it.

jQuery is a cross-browser JavaScript library designed to simplify the client-side scripting of HTML. jQuery is an open source JavaScript library that simplifies the interactions between an HTML document, or more precisely the Document Object Model (DOM), and JavaScript.

jQuery animate method is very powerful API to manipulate html elements and add animation functionality. The use of animate function is very simple.

The <script> tag is used to define a client-side script, such as a JavaScript. The script element either contains scripting statements or it points to an external script file through the src attribute.

jQuery.support is a collection of properties that represent the presence of different browser features or bugs. Primarily intended for jQuery's internal use; specific properties may be removed when they are no longer needed internally to improve page startup performance.

Introduction to jQuery and how to attach a handler to one or more events for all elements that match the selector.

JavaScript setTimeout function provides the functionality to execute the specified function after the sepcified number of milliseconds. Using the JavaScript setTimeout function you can set the delay before function execution.

JavaScript clearTimeout function enables you to stop the timer event started by the JavaScript setTimeout function. When you apply the setTimeout function using a recursive loop over the JavaScript function by specifying the time delay then it calls the function continuously after equal intervals of time.

Some of the most basic components we can manipulate when it comes to DOM elements are the properties and attributes assigned to those elements

Cookies are stored by the web browser. They allow you to store particular information about a user and retrieve it every time they visit your pages. Each user has their own unique set of cookies

The switch statement is used to select one statement from the many blocks. This is used on place of nested if…else. If there are number of if..else statements then we should use switch.

jQuery provides methods to manipulate documents in efficient way. You do not need to write big code to modify the value of any element's attribute or to extract HTML code from a paragraph or division.

JavaScript statement is a command that tells a browser to tell what to do. JavaScript statements is a instruction to browser and the statements are executed sequentially.

jQuery AJAX life cycle demonstration. This is a demonstration of the methods ajaxStart, ajaxSend, ajaxComplete, ajaxStop, and ajaxSuccess that are triggered when load method is called.

JavaScript validation are client side scrips that is used to reduce the server load because all validation are check on client browser. This example has a required validation on the input box.

A function in Javascript is a group of statement that is executed when it's triggered. A function can be called from anywhere within the page. As it is the part of javascript it is defined under the <script> tag.

JavaScript "==" is equal to operator.

Javascript variables is a key to an object of data. Variable is defined using 'var' keyword and JavaScript variables are case sensetive, so 'key' and 'Key' are two different variables.

JavaScript if…else is a conditional statement that is used to check wether a condition is true or false to take a decision.

jQuery ajaxStart and ajaxComplete are two functions are very useful to show the graphics while the data is loading from server. The ajaxStart method works while the server fullfilling the service asked to it. The ajaxComplete method is called when the server fulfilled the request.

Arithmatic operators are used to perform operations on the numbers.

There are some guidelines which must be remembered while coding in javascript. 1) Javascript is case-sensitive language. 2) JavaScript ignores extra white spaces. 3) You can break the line of code.

An object is an entity which can have properties, events and methods. This example creates a simple string holding the text 'hello world'. Some Standard Objects that are part of the JavaScript are 'String','Date','Array','Boolean','Array','Math' and 'RegExp'.

Javascripts loops are similar to other programming languages. Loops allows us to execute a block of statements to the specified number of times.

Javascript Try…catch statement to check if there is errors in a block of code.

Drag and Drop magic with HTML5 using an image to drag back and forth between four <div> elements.

These events are fired when a web page is loaded to browser and when user leaves the page.

The jQuery toggle method toggles the visibility of HTML elements using the show or hide methods. Shown elements are hidden and hidden elements are shown. The speed parameter can take the following values: "slow", "fast", "normal", or milliseconds.

Triggers whenever you Select/Highlight some text within textbox or textarea.

JavaScript clearInterval function enables you to stop the timer event started by the JavaScript setIntterval function. When you apply the setInterval function a JavaScript function by specifying the time interval then it calls the function continuously after equal intervals of time.

The drawImage method allows you to insert other images (img and canvas elements) into your canvas context. To draw an image using HTML5 Canvas, we can use the drawImage() method which requires an image object and a destination point. The destination point is relative to the top left corner of the image.

jQuery allows to change the multiple CSS properties value at once.

jQuery events can be used to register behaviors to take effect when the user interacts with the browser, and to further manipulate those registered behaviors.

JavaScript validation are client side scrips that is used to reduce the server load because all validation are check on client browser. This example validates numeric characters on the input.

To align HTML5 Canvas text, we can use the textAlign property of the canvas context, which can be set to start, end, left, center, or right. Unless otherwise specified, the textAlign property is defaulted to left.

Jquery traversing methods can be used to locate all the descendent elements of a particular type of elements.

This event are fired when a key is pressed. IE 8 and earlier use event.keyCode to retrieve the key that was pressed down, while Firefox/Chrome/Safari/Opera use event.which.

JavaScript setInterval function provides the functionality to execute the specified function after the sepcified time interval in milliseconds. Using the JavaScript setInterval function you can set the time interval to call a function again and again.

Javascript Try…catch statement to check if there is errors in a block of code.

Here in a text box the timer is display on "start count" button click and stop on "start count " click

JavaScript validation are client side scrips that is used to reduce the server load because all validation are check on client browser. This example validates the input matches a valid e-mail address with a regular expression.

The jQuery slideUp and slideDown methods gradually change the height of the selected elements.

The jQuery nth-child is used to select all elements that are ntg-child of of their parent. The nth-child(n) is “1-indexed”, meaning the “n” is counting starts at 1. Because jQuery's implementation of :nth-child(n) is strictly derived from the CSS specification, the value of n is "1-indexed", meaning that the counting starts at 1. For all other selector expressions, however, jQuery follows JavaScript's "0-indexed" counting.

HTML5 canvas populated with one filled rectangle and one painted stroke.

JavaScript validation are client side scrips that is used to reduce the server load because all validation are check on client browser. This example validates alphabetic characters on the input

Create a new window and move new browser window.

HTML script tag is used to define an section with javascript. In our example we have created two javascript function in the header. Note that each link shows a different way of calling the function.

jQuery mouse events are events that have to do with actions of the mouse. These can be a click, double-click, mouse down and more. Mouse events can be used in two different ways.

Using jquery manipulation methods, we can replace elements with another elements.

The jQuery fade methods gradually change the opacity for selected elements.

Register a handler with jQuery to be called when Ajax requests complete with an error. Whenever an Ajax request completes with an error, jQuery triggers the ajaxError event. Any and all handlers that have been registered with the .ajaxError() method are executed at this time.

jQuery provides methods to manipulate documents in efficient way. Using jquery manipulation methods, we can insert element in given document. Like here we add a new element before the blue square.

jQuery Animate can function supports animation in different directions

The switch statement is used to select one statement from the many blocks. This is used on place of nested if…else. If there are number of if..else statements then we should use switch.

he <noscript> tag is used to provide an alternate content for users that have disabled scripts in their browser or have a browser that doesn’t support client-side scripting. The noscript element can contain all the elements that you can find inside the body element of a normal HTML page. The content inside the noscript element will only be displayed if scripts are not supported, or are disabled in the user’s browser:

jQuery.browser contains flags for the useragent, read from navigator.userAgent. We recommend against using this property; please try to use feature detection instead (see jQuery.support). jQuery.browser may be moved to a plugin in a future release of jQuery.

The jQuery animate method has a complete method we can supply with callback function that is fired once the animation is complete. This can be useful for stringing different animations together in sequence like this example.

With jQuery you select (query) HTML elements and perform "actions" on them. The jQuery syntax is tailor made for selecting HTML elements and perform some action on the element(s) or attributes to element(s)

JavaScript event that triggers when object gets focus.

A function can take arguments whenever it is called. When arguments are passed on calling of function, the fuction is called 'function with arguments'. When a funtion does not take any argument function is called 'function without argument'. A function can return a value using the keyword 'return'.

The Frame and Iframe represents html frame and iframe respectively.This DOM object has all the properties that a HTML element has. We can change these properties using javascript.

screen object gives your browser screen information like width,height,color depth.

Opens a dialog window for printing the current web page.

JavaScript random method returns a random number between 0 and 1.

jQuery animate also support different properties and multiple unit types within one animation.

Using jQuery manipulation methods, we can remove elements.

This statement allows us to select one statement among many statements.It is also called nested if….else.

The HTML head Element The head element is a container for all the head elements. Elements inside <head> can include scripts, instruct the browser where to find style sheets, provide meta information, and more. The following tags can be added to the head section: <title>, <base>, <link>, <meta>, <script>, and <style>.

JavaScript logical operators are used to determine the logic between variables and values.

Javascript provides us the facility to break a loop in middle and also to continue the loop without executing the whole body of the loop.There are two keywords that provides these facilities: 1) break 2) continue

jQuery contains powerful methods (functions) for changing and manipulating HTML elements and attributes. Click on the button to see jQuery hiding the paragraphs.

JavaScript can be written at any place in the page or can be in external file. JavaScript is written in the head section in <script> tag.

This event is fired when the form is submitted. This is only works with the form element of the HTML.

Most of the JQuery Traversal Methods do not modify the jQuery object and they are used to filter out elements from a document based on given conditions. The filter( selector ) method can be used to filter out all elements from the set of matched elements that do not match the specified selector(s).

jQuery also allows us the set the property value of the CSS.

The Navigator object contains information about the visitor's browser.

Count number of attributes that exists for the button.

Do…While loop is the varient of the while loop. The difference between while and do…while is that while loop only executes if the condition is true while do….while loop executes atleast once even the codition is false.

make your HTML pages become more dynamic and interactive by using JavaScript

We are here using Core DOM setAttribute method we set the value of input type text to button.

The HTML paragraph element is written on the web page before the dynamic content from the script. That is because the script tag is after the paragraph tag. If you move the HTML script element to the "head" tag you will see the dynamic text is written first!

Example how to call anonymous function on setTimeout function.

The link object is used to include the external file in the web page. This tag must be inside the head tag of the page. Here is the example of the link that give the type of the external sheet.

jQuery selectors allow you to select and manipulate HTML elements as a group or as a single element.

A javascript Math object allows us to perform the mathematical tasks.

A small example displaying the usage of two JavaScript keywords in a code block.

The Date object is used to work with dates and times.

If you provide a return statement inside a function you may specify the value that you would like to return from the function. So, functions that are going to return a value must use the return statement.

Enables you to remove a client cookie with JavaScript. We remove the cookie by setting the expiration date for the cookie back in time.

Almost all JavaScript code should be in separate JavaScript files. There should be the smallest possible amount of JavaScript inline in the HTML code of pages.

JavaScript regular expression can be used to maniplate strings and perform text searches. In this example we do a case-insensitive search for "www.webgrid.com" in a string.

JavaScript < is less then operator.

Javascript array is used to store multiple values in a variable.

If a variable is defined in a function then it will be local for this function, it can not be used outside of that function. A variable which is defined outside of the fuction becomes Global and this variable can be used in whole webpage document.

While most current browsers understand Javascript a lot of the early browsers did not. The current browsers also allow Javascript to be turned off and some people do this. What this means is that not all of the visitors to your page will see the effects of the JavaScript on your page. We need to make sure that these visitors can use our site even without JavaScript.

JavaScript "==" is not equal to operator.

JavaScript code are the sequence of statements.These statements can be grouped. These grouped are called blocks and the blocks are created using {} brackets.

As 'for loop' executes the specified number of times, the while loop executes while a condition is true.

The String object is used to manipulate texts.

The Boolean object is used to convert a non-Boolean value to a Boolean value (true or false).

The flexible nature of JavaScript variable types can lead to confusion as to the particular type of a variable at any given time in a script. To address this concern JavaScript provides the typeof operator. The typeof operator returns the current variable type of the specified variable.

JavaScript "===" is exactly equal to (value and type) operator.

Try not to use too many different JavaScript files. Each separate file that the browser has to load incurs an overhead. You may consider to merge and minimise JavaScript files before you publish your website. This to reduce the bandwidth usage and lower webpage load time.

Comparision Operators are used to compare the values of the variables, and the result is used to make the decision.

Javascript assignment operators are used to assign values.There 6 assignment operators that can be used.

JavaScript > is greater or equal to operator.

JavaScript > is less or equal to operator.

JavaScript > is greater then operator.

The || (or operator) logical operator are used to determine the logic between variables or values.

The && (and operator) logical operator are used to determine the logic between variables or values.

The ! (not operator) logical operator are used to determine the logic between variables or values.