前面一个CSS教程介绍了在网页中利用CSS建立立体表格效果，今天给大家来一篇很不错的鼠标悬停效果，也是用CSS实现的。 　　这是一个很棒的鼠标悬停（hover）效果。从国外的网站上看到了，转载过来。没有作任何翻译与编辑，大家可以偿试阅读英文教程，加油！　　注意：此悬停效果在IE6中无效　　实例预览地址：http://www.prukc.com/　　IwouldliketosharesomeinsightonapieceofCSSI’veusedforthehomepageforawebsiteawhileagothatI’vebuilttogetherwithRogerJohansson.TheHTMLmarkup　　Let’stakealookfirstattheHTMLmarkupforthis.Firstweneedtothinkaboutthestructureofthispieceofcontent.HowshoulditbestructuredwithCSSdisabledandstillmakesensefortheuser.Ithinkabulletlistmakessense.Wesumupthe4differentwaystofindyourKansasCityHomesforSale.Thisisthe(X)HTMLmarkup: HTML： <h2>4differentwaystofindyourKansasCityHomesforSale</h2><ulid="differences"><liid="diff-1"><h3><em>1</em><ahref="benefits.html">SeeallMLShomeslikeaninsider—joinus</a></h3><div><p><ahref="benefits.html">Joinus</a>andsee<strong>2,207</strong>additionalhomes,e-mailupdates,andfreecustomwebsite.</p></div></li><liid="diff-2"><h3><em>2</em>Whatismyhouseworth?</h3><div><p>Findthe<ahref="/"title="empty">valueofyourhome</a>fromanyofouragentswithourcompetitivemarketanalysis.</p></div></li><liid="diff-3"><h3><em>3</em>Google™searchKansasCityareahomesinMLS</h3><div><p><ahref="/"title="empty">SearchvirtuallyallMLShomes</a>inthegreaterKansasCityareabyusingGoogle™.</p></div></li><liid="diff-4"><h3><em>4</em>MapKansasCityrealestateinGoogle™maps</h3><div><p><ahref="cma.html"title="empty">Seethelocation</a>ofallKansasCityrealestatewithGoogle™maps—maporsatelliteviews.</p></div></li></ul> 　　IfyoulookatethepagewithCSSdisabled,Ithinkthismarkupiswellstructuredandit’sperfecttobuildthenecessaryCSStoachievethestyleIhaveinmind.Thebackgroundimages　　IfyoulookatthefinalpageandtheeffectIwanttoachievewiththetabs,youknowthatIneedtocreatebackgroundimagesforthisthatareabletogrowiftheuserenlargesthetext.Hereishowtheylook:　　diff-tabs-top-wide.gif 　　diff-tabs-bottom-wide.gif 　　You'llnoticethatboththehoverbackgroundandthedefaultbackgroundaresavedas1giffile.Thiswaythehovereffectwillgosmoothwithoutinteruption.Theentireimageisloadedandthebrowserdoesn’thavetoloadthehoverimagesonthemomenttheuserhoversthebox.Tobesuretheboxcangrowwesavethebottompartoftheboxandthetoppartofthebox,makingitlongenoughtobesuretherewillbenogaps(tillacertainenlargement).TheCSSstylesTheunorderedlist“differences”　　ThisistheCSSfortheliststartingwiththeunorderedlistofthe4boxes.TopreventthemarginstocollapseI’veaddedfloat:left. #differences{margin:0.5em01.5em0;padding:0;list-style:none;width:100%;float:left;} Thelielementstyleslooklikethis: #differencesli{margin:018px00;padding:0;float:left;background:url(../images/diff-tabs-top-wide.gif)no-repeat00;} 　　Iaddaright-marginof18pxtocreateagutterbetweeneachbox.Thelastboxintherowdoesn’tneedthismargin.Eachlielementhasanid.Theidforthelastoneis#diff-4.SoIaddthisCSSstyle: #differencesli#diff-4{margin-right:0;} Makingsurethetabbedboxescangrow　　Asyou’venoticed,we’velinkedthetoppartofthebackgroundimage(thetabshape)tothelielementviaCSS.Tomakesurethetabbedboxescangrowiftheuserenlargeshistext,weneedtoaddanextradivineachlielement.ThiswaywecanlinkthebottompartoftheimagetothisdivviaCSS: #differencesdiv{font-size:0.94em;padding:6px;background:url(../images/diff-tabs-bottom-wide.gif)no-repeat0100%;} 　　WithCSS3wedon’thavetogothroughthishassleofaddingextradivs,becauseCSS3allowsformultiplebackgroundimagesononeelement.ThisismytopfavoriteCSS3feature:)Creatingthehovereffect　　I’veusedbackgroundpositioningtocreatethehovereffectonthelielementusingthe:hoverpseudo-class.TheCSSlookslikethis: #differencesli:hover{background-position:-156px0;}#differencesli:hoverdiv{background-position:-156px100%;} 　　Thexcoordinateissetto-156px.Thiswaythepinkorangepartofthebackgroundimagewillbeshown.Thefirststylerepresentsthetoppartofthetabbedboxandthe2ndonethebottompart.RememberIhadtoaddanextradivtomakesuretheboxcangrow(tillacertainenlargement).Thepageusesadynamicresolutiondependentlayout　　Notsureifyou’venoticedornot,butifyouresizeyourbrowserwindowtolessthen750pixelswide,thepagewilladjustitslayout.ThisisdoneusingajavascriptcreatedbyKevinHaleofParticleTreeincombinationwithCSS.I’musinganextraCSSstylesheetthatisappliedifthebrowserwindowisresizedtolessthen750pixels.Bydefaultthepage/siteusesthewiderversion,whichisaimedtoascreenresolutionof1024x768.About90%ofthevisitorsofthePrudentialKansasCityvisitorsareusingascreenresolutionofatleast1024x768pixels.　　HopefullysomeofyouhavelearnedfromthisarticleandareinspiredtouseCSSinacreativewaywithoutoverlookingtheaccessibilitypartofitandkeepingtherightstructureinmindforthe(X)HTML.I’mstillcreatingnewtemplatesforthiswebsiteonanoccasionalbasis.Thiswebsiteisratherbigandnewfeaturesareconstantlyaddedbytheclientandthedeveloper.　　Ohandlet’snotforgettomentionthatitisalwaysgreattoworktogetherwithRoger.He’spickyinwhathedoes,butthat’swhatIloveaboutworkingwithhim,andofcourseIalwayschallengehimwithmydesigns:)　　Previewurl:http://www.prukc.com/

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原文：http://jorux.com/archives/property-1-if-you-love-css/ 本教程主要介绍css的基础知识,将逐个讲解css的各个属性,过程可能比较枯燥,但会尽力多举例说明. css语法 例:用Web Developer的css查看功能查看J>>>详细阅读

本文标题：英文教程：鼠标悬停（hover）效果

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