OBJECTS

A OBJECT IS A PCKAGE OF DATA, A COLLECTION OF PROPERTIES(VARIABLES) AND METHODS(FUNCTIONS) ALL CLASSED UNDER A SINGLE NAME.THESE PROPERTIES MAY BE MORE THAN ONE BUT THEY ALL ARE RELATED TO A COMMON NAME OR A SINGLE NAME.

OBJECTS ALLOW YOU TO COMBINE SEVERAL KINDS OF PROPERTIES AND FUNCTIONS TO ACT ON THE METHODS OINTO THE CONVENIENT PACKAGE

OBJECT HAS A SPECIAL FUNCTION CALLED CONSTRUCTOR.
THIS CONSTRUCTOE IS USED TO CREAT OBJECTS.

THE OBJECTS ARE DIVIDED INTO FOUR CATEGORIES-

1. FORM OBJECTS
2. BUILT-IN OBJECTS
3. BROWSER ONJECTS
4. CUSTOM OBJECTS

FORM OBJECT- FORM OBJECT ARE SIMILAR TO FORM TAG WHICH WE HAD USED EARLIER IN HTML. FORM OBJECT HAS NAME,METHOD AND ACTION.

ELEMENTS OF FORM ARE-

1. BUTTON

PROPERTIES-
NAME
VALUE

METHODS-

CLICK( )
EVENT-

ONCLICK
2. TEXT

PROPERTIES-

NAME
VALUE

METHOD-

FOCUS( )
BLUR( )
SELECT ( )
EVENT-

ONFOCUS ( )
ONBLUR ( )
ONSELECT ( )
ONCHANGE( )

3. TEXT AREA

PROPERTIES-NAME
VALUE

METHODS-FOCUS( )
BLUR( )
SELECT ( )

EVENTS-
ONFOCUS( )
ONBLUR ( )
ONSELECT ( )
4. SUBMIT


PRPERTIES-NAME
VALUE

METHOD-CLICK( )

EVENT-ONCLICK( )

5. RESET

PROPERTIES-
NAME
VALUE

METHOD-CLICK( )
EVENT-
ONCLICK( )

6. RADIO BUTTONS-


PROPERTIES-INDEX
LENGTH
NAME

METHOD-
CLICKED( )

EVENT- ONCLICKED( )
7. CHECKBOX

PROPERTIES-NAME
VALUE
CHECKED

METHOD-
CLICK( )

EVENT-
ONCLICK( )
8. SELECT AND OPTION

PROPERTIES-
INDEX
SELECTED
VALUE
DEFAULTSELECTED
SELECTEDINDEX

METHODS-
BNLUR( )
CHANGE ()
FOCUS( )

EVENTS-
ONBLUR( )
ONFOCUS( )
ONCHANGE ( )

9. PASSWORD

PROPERTIES-
NAME
VALUE

METHOD-
FOCUS ( )
BLUR( )
SELECT( )

VENTS-OFOCUS( )
ONBLUR( )
ONSELECT( )
ONCHANGE( )



EXAMPLE INCLUDING FORM ELEMENTS-

BUILT IN OBJECTS-
1. STRING-IT ENABLES PROGRAMS TO WORK WITH AND MANIPULATE STRINGS OF TEXT.
METHODS OF STRING OBJECTS-
BIG( )
BLINK( )
BOLD( )
CHARAT( )
ITALICS( )
TOLOWERCASE( )
TOUPPERCASE( )
SUBSTRING ( )

2. DATE- IT ENABLES THE USER TO CREAT AN OBJECT YTHAT CONTAINS INFORMATION ABOUT A PARTICULAR DATE AND PROVIDES A SET OF METHODS TO WORK WITH THAT INFORMATION.

METHODS OF DATE OBJECT-

SETDATE( )
GETDATE( )
SETHOURS( )
GETHOURS( )
SETTIME ( )
GETTIME ( )

EXAMLPLE ILLUSTARTING THE USE OF DATE OBJECT-

ANOTHER EXAMPLE OF DISPLAYING THE DATE AND TIME OF SYSTEM-

3. ARRAY-IT CREATES A NEW ARRAY.
4. MATH-IT PROVIDES THE METHODS AND PROPERTIES TO MOVE BEYOND SIMPLE ARITHEMATIC MANIPULATIONS OFFERED BY ARITHEMATIC OPERATORS.

,METHODS OF MATH OBJECT-

ABS( )
CEIL( )
FLOOR( )
COS( )
SIN( )
TAN( )
POW( )
RANDOM( )
SQRT ()


MOVEMENT OF IMAGES CALLING WINDOW-SET TIME PROPERTY-

BROWSER ONJECTS-
1.WINDOW-IT REPRESENTS THE BROWSER’S WINDOW

METHDS OF BROWSER OBJECTS-
WINDOW.STATUS( )
WINNDOW.ALERT( )
WINDOW.PROMPT( )
WINDOW.CONFIRM ( )
WINSOW.OPEN( )
WINDOW.LASTMODIFIED( )

EXAMPLE OF BROWSER OBJECTS-






2.HISTORY- IT IS THE ANOTHER BROWSER OBJECT.IT COMES UNDER THE CATEGORIE OFWINDOW OBJECTS.IT IS CONSISDERED AS THE CHILD OF WINDOW OBJECT.

METHODS OF HISTORY OBJECT-
HISTORY.LENGTH( )
HISTORY.CURRENT( )
HISTOR.NEXT( )
HISTORY.PREVIOS( )
HISTORY.GO( )
HISTORY.BACK( )

USER-DEFINED/CUSTOM OBJECTS-

1. THESE ARE USED TO CREATE OWN OBJECTS AND ASSIGN PROPERTIES TO IT.

PROGRAM USING CUSTOM OBJECTS-









TO SEE THE BROWSER INFORMATION-







EXAMPLE OFMOVEMENT OF WINDOW OVER OTHER WINDOW-








REVERSING AND SORTONG OF NAMES-

SCROLLING OF TEXT-

TOCHECK WHETHER THJE YAHOO ID IS CORRECT OR NOT-