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JavaScript base 15--js Dom Object

Source: Internet
Author: User
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1 <!DOCTYPE HTML>2 <HTML>3     <Head>4         <MetaCharSet= "UTF-8">5         <title>The DOM object of JS</title>6         <Scripttype= "Text/javascript">7             //Dom:document Object Model Document objects8             /*9 documents: Hypertext document HTML, XMLTen object: Provides properties and methods One model: Manipulating Hypertext-tagged documents using properties and methods A You can use the JS DOM-provided object to manipulate the tagged document using the properties and methods of these objects - you need to encapsulate the tags, attributes, and text contents of HTML into objects. -              */ the              /*  - There are three types of DOM models - DOM Level 1: Encapsulate an HTML document as an object - DOM Level 2: Add new features based on the 1, for example: Support for events and CSS styles + DOM Level 3: Support for some new features of XML 1.0 -              */ +              /*  A parsing Process at Assigning a tree structure in memory based on the hierarchy of HTML requires that each part of the HTML be encapsulated as an object - Document: Entire HTML document - element: Tag Object - Property Object - Text Object - Node Nodes object: Is the parent object of these objects in              */ -              /*  to Common Properties + all[] Provides access to all HTML elements in the document, FF does not support - forms[] Returns references to all form objects in the document the body provides direct access to <body> elements * Common Methods $ getElementById () returns a reference to the first object that owns the specified IDPanax Notoginseng Getelementsbyname () returns a collection of objects with the specified name - getElementsByTagName () returns a collection of objects with the specified label name the write () writes HTML code or JavaScript code to the document +              */ A window.onload= function() { the                 varspans=document.getElementsByTagName ("span")[1]; +                 //For (var i = 0; i < spans.length; i++) -                 //{ $                     //var span = spans[i]; $ document.write ("<br/>span:" +spans.innerhtml); -                 //} -              } the         </Script> -     </Head>Wuyi     <Body> the         <BR/><BR/><BR/> -         <span>AAAAA</span> Wu         <span>bbbbb</span> -         <span>Ccccc</span> About         <span>Ddddd</span> $     </Body> - </HTML>

JavaScript base 15--js Dom Object

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