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Basic JavaScript Guide.
 JScript Introduction.            
 JScript Why?
 JScript Recognitions.          
 JScript onMouseover.         
 JScript with Buttons.           
 JScript Alerts.                     
 JScript Variables.               
 JScript Operators.               
 JScript Functions.               
 JScript Prompts.                 
 JScript Conditions.             
 JScript Validations.            
 JScript Confirmation Boxes.
 JScript Browser Detection.  
 JScript Redirection.            
 JScript on Links.                 
 JScript Switch.                    
 JScript Loops.                     
 JScript Events.                    
 JScript Exception Handling.
 JScript Reserve Characters. 
 JScript with Objects.            
 JScript Math Object.           
 JScript using Dates.             
 JScript using String.            
 JScript using Arrays.            
 JScript Operations.              
 JScript Handling Cookies.   
 JScript in Mapping.             
 JScript Time Out.                
 JScript Summary.                

JavaScript Tutorial >> JavaScript Why?


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Some times we need the functionality such as HTML Data Form validation. Then in web development we have two kind of methods to valid the entire data form.  One is to validate it on server side, mean with PHP, ASP, or JSP.  It is a fact that when we use server side scripting language our web server need to work much more.  And experience says that we need to use client side scripting instead of server side for validations like email address validations, some text boxes are empty or not and much more.  When we use JavaScript to validate some data on client side this will make our browsing fast and suppose instead of client side we use server side then the performance of this validation will be slow.

Client side scripts are executes or validate on the client's computer that's why its performance is fast and the server side scripts execute on web server where site is hosted, for this execution entire the internet will be use for the validations.

Here our JavaScript Tutorial will express all of us that the JavaScript is a very easy way to add all sorts of dynamic elements to our sites. Unless we've some programming experience, JavaScript will be quite a new concept at the start it's fairly different to HTML. In this JavaScript Tutorial we'll be laying some groundwork on the language, and writing our first script.

JavaScript is a client-side language, which means all the action occurs on the client's (reader's) side of things. This means that no trips to the server are required for JavaScript to kick into operation, which would slow down execution process enormously. JavaScript operations are usually performed instantaneously. In fact, JavaScript is often used to perform operations that would otherwise encumber the server, like form input validation. This distribution of work to the relatively quick client-side service speeds up the process.

JavaScript is integrated into the browsing environment, which means JavaScript can get information about the browser and HTML page, and modify this information, thus changing how things are presented on your screen. This access to information gives JavaScript great power to modify the browsing experience. JavaScript can also react to events, such as when the user clicks their mouse, or points to a certain page element. This is also a very powerful ability of JavaScript.

Most importantly, JavaScript isn't overly tough to learn and use. It's a little technical, of course, but after just go through a few pages of this JavaScript Tutorial you'll have some useful scripts in your pages, and will have the knowledge necessary to modify and use the countless free JavaScript available across this JavaScript Tutorial.


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Fundamentals of JavaScript Examples



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