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1、河北建筑工程学院毕业设计（论文）外文资料翻译系别：计算机系专业：计算机科学与技术班级：计092班姓名：孙全华学号：2009309216外文出处：导师提供指导教师评语：签字：年月日英语原文：DocumentObjectModelandDynamicHTMLThetermDynamicHTML,oftenabbreviatedDHTML,referstothetechniqueofmakingWebpagesdynamicbyclient-sidescriptingtomanipulatethedocumentconte
2、ntandpresentation.Webpagescanbemademorelively,dynamic,orinteractivebyDHTMLtechniques.WithDHTML,youcanprescribeactionstriggeredbybrowsereventstomakethepagemorelivelyandresponsive.Suchactionsmayalterthecontentandappearanceofanypartsofthepage.Thechangesarefastande
3、fficientbecausetheyaremadebythebrowserwithouthavingtonetworkwithanyservers.Typically,theclient-sidescriptingiswritteninJavaScriptandbasictechniquesformakingWebpagesdynamic.Contrarytowhatthenamemaysuggest,DHTMLisnotamarkuplanguageorasoftwaretool.Itisatechniqueto
4、makeWebpagesdynamicthroughclient-sideprogramming.Inthepast,DHTMLreliedonbrowser-andvendor-specificfeatures.Makingsuchpagesworkforallbrowsersrequiresmucheffort,testing,andunnecessarilylongprograms.StandardizationeffortsatW3Candelsewherearemakingitpossibletowrite
5、standard-basedDHTMLthatworksforallcompliantbrowsers.Standard-basedDHTMLinvolvesthreeaspects.1.JavaScript—forcross-browserscripting(Chapter9)2.CascadingStyleSheets(CSS)—forstyleandpresentationcontrol(Chapter6)3.DocumentObjectModel(DOM)—forauniformprogramminginte
6、rfacetoaccessandmanipulatetheWebpageasadocumentWhenthesethreeaspectsarecombined,yougettheabilitytoprogramchangesinWebpagesinreactiontouser-orbrowser-generatedevents.Therefore,youcanmakeHTMLpagesmoredynamic.PopularwithWebdevelopers,supportedbyallmajorbrowsers,an
7、dstandardized,JavaScriptprovidestheabilitytoprogrambrowseractionsinresponsetoevents.Tohavetruecross-platformDHTML,westillneedauniformwayforJavaScripttoaccessandmanipulateWebdocuments.ThisbringsustotheDOM.10.1WhatisDOM?Theobjectiveofunitandintegrationtestingwast
8、oensurethatthecodeimplementedthedesignproperly;thatis,thattheprogrammerswrotecodetodowhatthedesignersintended.Insystemtesting,wehaveaverydifferentobjective:toensurethatthesy
