Web Technologies

Scope of this notes:
webpage design, upload the wesite at some shared webspace available from some ISP. Simple form and multimedia in your website.
Out of scope:
Web server itself, webserver programs like Apache and IIS, web sevrer interaction with DB server. User interation with forms etc. Database query.
Website construction tool:
Adobe Photoshop:
used for photo and images. Like cut a plane from somewhere and put it in other image of cloud etc. File type .psd. This file type contains diiferent layers and other characteristics of Photoshop. Therefore, before using that as an image, one must save it as .jpg.
Micromedia Dreamweaver or Adobe Go Live or Microsoft FrontPage:
Used to create a webpage. Also called as website construction tool. They generate the correct code for the table.Similarly, they will generate code for rollover, image maps etc. Therefore, each line of HTML code writting is not required. Wasting hours in aligning is also not required. These tools do the reverse job. Create table- they will create code automaticlly. Other thing that Dreamweaver do is placing the images made by photoshop at the right aligment, adding text and hyperlink on it, etc.
Web design combines number of disciplines:
Graphics design
Interface design- method of doing things. How page works etc.
Prgramming and scripting- Forms and interactivity. Writing scripts, programs and application for working with database, servers and so on.
Information design- organisation of content and you get it.flowchart and diagram.
HTML Production- using Dreamweaver or Golive.
Multimedia- Using Micromedia Flash and Director
ISP and buy space on the web server:
Hosting / FTP user name: Testing
Hosting / FTP password: password
Website URL: http://www. Testwebsite.com
FTP Site URL: ftp://www. Testwebsite.com
FTP site, username and password are used for site admin. You will have to use FTP client like SmartFTP or Internet explorer for uploading content to the site.
Sound and video clips are stored in one folder. Images are stored in other folder. Other HTML pages are stored in mail folder.
Some Technicalities:
HTMLcodetutorial.com
yourhtmlsource.com
webopedia.coma.ratna
DHTML: eg- changing of image on mouse rollover. Life and fun on the webpage. Supported only on version 4 and above browser.
Javascript: Scripting language developed by Netscape. Client side programming language. Used for form validation etc. Can not be used for anything else outside browser.Can be embedded in the webpage.
ASP:
Active Server pages
Runs inside IIS
IIS is free component of W2k and above.
PWS is a smaller but fully functional version of IIS
Chili and Instant ASP runs without Windows
ASP file is just same as the HTML file except it has .asp extension.
ASP file contains- HTML, XML and scripts. Scripts on ASP file runs on server.
How ASP different from HTML?
When browser requests an HTML file, server returns HTML file. When browser requests ASP file, IIS passes the request to ASP engine. ASP engine reads the ASP file line by line, executes the script in the file. Finally ASP file is retured to the browser as a plain HTML file.
PHP:
Again a scripting language, especially suited for web development and can be embedded into HTML.It is HTML embedded scripting language.
What it does?
Anything! Other CGI program can do. However there are three main things where PHP is used.
Server side scripting
Command line scripting
Writing desktop applications