SYSTEM DEVELOPMENT ENVIRONMENT
1. HTML
WHAT IS HTML?
To publish information for global distribution, one needs a university-understood
language, a kind of publishing mother tongue that all computers may potentially
...
SYSTEM DEVELOPMENT ENVIRONMENT
1. HTML
WHAT IS HTML?
To publish information for global distribution, one needs a university-understood
language, a kind of publishing mother tongue that all computers may potentially
understand. The publishing language used by the World Wide Web is HTML
(Hyper Text Markup Language)
HTML Gives Authors the Means To
1. Publish online documents with headings, text, tables, list, photos etc.
2. Retrieve online information via hypertext links, at the click of a button
3. Design forms for conducting transactions with remote services, for use in
searching information, making reservation, ordering products etc.;
4. Includes spreadsheets, video clips, sound clips, and other applications
directly in the documents.
5.
Some HTML Tags
:Starting an HTML tag
: Creating a web page’s head
: Giving a web page ‘s body
</HEAD> : Ending a web pages head
</BODY> : Ending a web pages body
</HTML> :Ending a web page
<FORM> : Creating a HTML forms
<INPUT TYPE=BUTTON> : Creating a buttons
<INPUT TYPE=CHECKBOX> : Creating a checkboxes
<INPUT TYPE=SUBMIT> : Creating a submit button
<INPUT TYPE=TEXT> : Creating a text fields
HTML 4.0
HTML 4.0 extends with mechanisms for style sheets, scripting, frames embedding
objects, improved support for right to left and mixed direction texts, richer tables
and enhancements to form, offering improved accessibilities for people with
disability.
2. INTRODUCTION TO JAVA SCRIPT
WHAT IS JAVA SCRIPT?
JavaScript, originally supported by Netscape Navigator, is the most popular Web
scripting language today. JavaScript lets you embed programs right in your Web
pages and run these programs using the Web browser. You place these programs in
a <SCRIPT> element. If you want the script to write directly to the Web page,
place it in the <BODY> element.
EX: <HTML>
<HEAD>
<TITLE>
JAVASCRIPTS OBJECTS
JavaScript is an object-oriented language. JavaScript comes with a number of
predefined objects.
Objects of the JavaScript
1. Document: Corresponds to the current Web page’s body. Using this object,
you have access to the HTML of the page itself, including the all links,
images and anchors in it.
2. Form: Holds information about HTML forms in the current page.
3. Frame: Refers to a frame in the browser’s window.
4. History: Holds the records of sites the Web browser has visited before
reaching the current page.
5. Location: Holds information about the location of the current web page.
6. Navigator: Refers to the browser itself, letting you determine what browser
the user has.
7. Window: Refers to the current browser window.
JAVASCRIPTS EVENTS
Some of the events of JavaScript
1. on Change: Occurs when data in a control, like a text field, changes.
2. on Click: Occurs when an element is clicked.
3. on Focus: Occurs when an element gets the focus.
4. on Mouse Down: Occurs when a mouse button goes down.
5. on Reset: Occurs when the user clicks the reset button.
JAVASCRIPTS FUNCTIONS
Declaration of function
Syntax: function function name ()
{
…
…
}
Write these functions in
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