Explain Java Script Builtin Objects

Most of the objects that you will use in your script will be prebuilt once. That come with the browser. The document object. The window object. The form object Browser object Date object. The document object:-  A document is a web page that is being either displayed (or) created. The document has a no.of properties that can be accessed by java script programs and used to manipulate the control of the page. Write, writeln:- Any data (or) html tags can be rendered within these methods. Eg:- document. write (“<b> name </b>”);         document. writeln (“<h1 > text </h1>”); bgcolor, fgcolor:- These properties are responsible for setting the background color of the page (or) foreground color of the page elements. Eg:-  document. bgcolor = “red”;          document. fgcolor = “yellow”; Close( ):- It usually shuts the process of entering of data on the current page. The document is not completely returned until the close method has been called.  Eg:-  document. close ( ); The window object:-  The browser window is a mutable object that can be addressed by a java script code. Some of the methods of window objects. Open (“URL”,”name”):- This opens a new window which contains the document specified by “URL”. Close( ):- This shuts the current window.      tool bar = [0/1]      Location = 0 (or) 1      Directories = 1 (or) 0      Status = 1 (or) 0      Menu bar = 1 (or) 0      Scroll bar = 1 (or) 0      Resizable = 1 (or) 0      Width = pixels      Height = pixels When positioning the content, especially on dynamic pages it is useful to be able to locate it whatever the resolution of the screen or size of the window being used. Eg:- new window = open (“newwin”, status = “o”, width = “ 100”, height = “100”, scroll bar =  “1”, tool bar = “1”); The form object:- Two aspects of the form can be manipulated through java script. First – the data that is entered in to the your form can be checked at submission. Second – you can built form’s through java script. onClick = “Method”:-  This event is triggered when the user clicks on that element. onSubmit = “Method”:- This event is can be triggered by the form itself and occurs when the form is submitted. OnRest = “Method”:- This is triggered when a form is ‘reset’ by the user. The browser object:-  No two browser models will process your java script in the same way. So you try to find out which browser is being used to view your web page. The browser is a java script object for historical reasons the browser object is actually called the navigator object. navigator.appCodeName:-  It provides the internal name of the browser.  Eg:- Mozilla navigator.appName:- It gives the globally recognized name of the browser. This is the public name of the browser.  Eg:- Internet explorer. naivgator. AppVersion:-  It is used to supply the version number, platform on which the browser is running. navigator.userAgent:- the strings app code name & appversion concatenated together. navigator.pluggins:- An array containing details of all installed plugging’s. navigator.mimetypes:- An array of all supported mime types. Date object:- Manipulating date and times is a complicated business. Like most programming systems java script has two separate notations of time; UTC and local. (UTC – universal time) Date( ) Construct an empty date object. Date(string):- Create a date object based upon the content’s of a text string. Date: (year, month, day [hours, minutes, seconds]):- create a new date object based upon numerical values for the year, month and day. getDate( ):- Return the day of the month. getDay( ):- Return an integer representing the day of the week. Sunday = is ‘o’ & Saturday is ‘6’. getFullyear( ):- Return the year as a four digit no. getHours( ):- Return the hour field of the day object.