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الكلية كلية تكنولوجيا المعلومات
القسم قسم شبكات المعلومات
المرحلة 3
أستاذ المادة حۡــسۜــنۨ ا̍ڷــڔهــٻۧــمۘــې
3/6/2012 10:01:56 PM
Node object
The Node object represents a node in the HTML document.A node in an HTML document is:
• The Document
• An element
• An attribute
• Text
• A comment
Document Object
Each HTML document loaded into a browser window becomes a Document object. The Document object provides access to all HTML elements in a page, from within a script , The Document object is also part of the Window object, and can be accessed through the window.document property.The Document object can also use the properties and methods of the Node object.
Document Object Properties
Anchors : Returns a collection of all the anchors in the document
body : Returns the body element of the document
cookie : Returns all name/value pairs of cookies in the document
domain : Returns the domain name of the server that loaded the document
forms : Returns a collection of all the forms in the document
images : Returns a collection of all the images in the document
lastModified : Returns the date and time the document was last modified
links : Returns a collection of all the links in the document
readyState : Returns the (loading) status of the document
referrer : Returns the URL of the document that loaded the current document
title : Sets or returns the title of the document
URL : Returns the full URL of the document
NOTE : These are Object Properties so you can access them directly without the need to create new instance object of document , see below examples :
• document.write(document.URL); • document.write(document.title);
Document Object Methods
getElementsByName()
The getElementsByName() method accesses all elements with the specified name.
Syntax : document.getElementsByName(name)
• name [Required]. The name of the element you want to access/manipulate
Example : Alert the number of elements with a specific name:
var x=document.getElementsByName("x");
alert(x.length);
open()
The open() method opens an output stream to collect the output from any document.write() or document.writeln() methods.Once all the writes are performed, the document.close() method causes any output written to the output stream to be displayed.Note If a document already exists in the target it will be cleared. If this method has no arguments, a new window (about:blank) is displayed.
Syntax : document.open(MIMEtype,replace)
• MIMEtype [Optional]. The type of document you are writing to. Default value is "text/html"
• replace [Optional]. If set, the history entry for the new document inherits the history entry from the document which opened this document
Example Open an output stream, add some text, then close the output stream:
var doc=document.open("text/html","replace");
var txt="<html><body>Learning about the HTML DOM is fun!</body></html>";
doc.write(txt);
doc.close();
close()
Closes the output stream previously opened with document.open()
write()
Writes HTML expressions or JavaScript code to a document ,The write() method writes HTML expressions or JavaScript code to a document.
Syntax : document.write(exp1,exp2,exp3,...)
writeln()
The writeln() method is identical to the write() method, with the addition of writing a newline character after each statement.
Syntax : document.writeln(exp1,exp2,exp3,...)
Element Object
The Element object represents an element in the HTML document. The Element object can have child nodes of type Element, Text, Comment, CDATASection, ProcessingInstruction, and EntityReference. The Element object can have attributes, which have the node type Attr. The Element object can also use the properties and methods of the Node object.
Element Object Properties
• schemaTypeInfo Returns the type information of the element.
• tagName Returns the tag name of the element
Example , Get the tagName of an element:
document.getElementById("demo").tagName;
The result will be: P
The Entire Objects Description is explained in the Attached File
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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