Week 4

14 March 2016
 The topic that we were talking about is Concept of Client Server & Internet Application.

There are 2 parts of scripting languages:

1. Client- side scripts (css) for browser
2. Server- side scripts (sss) for server

Client- side scripts

•Scripts are interpreted or executed by the browser/client

•Example: JavaScript, Jscript, VBScript

•Can be embedded into HTML documents or contained in separate file

•Used to validate user input, accesses the browser and enhances Web Pages with DHTML, ActiveX controls and Java applets

•Processed at the browser, not processed at the Web server– longer downloading time depending on the size

•Reduces the number of requests that need to be passed to server. Thus reduced server load

•Browser dependence

•The browser must support the scripting languages

•To see CSS, view the source

Server- side scripts

•Example: PHP, ASP, ASP.Net, JSP, CGI

•Provide interactive web sites that interface to databases or other data stores 

•Processed by the server to generate html and return as response to the browser

•Scripts are embedded in html documents

•Specialty…

–Browser/Client independence 

–Response time is small

–Data retrieved from database, not left at the client

–Powerful