娟子

/* Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net) * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. * * $LastChangedDate: 2007-06-19 20:25:28 -0500 (Tue, 19 Jun 2007) $ * $Rev: 2111 $ * * Version 2.1 */ (function($){$.fn.bgIframe=$.fn.bgiframe=function(s){if($.browser.msie&&parseInt($.browser.version)<=6){s=$.extend({top:'auto',left:'auto',width:'auto',height:'auto',opacity:true,src:'JavaScript:false;'},s||{});var prop=function(n){return n&&n.constructor==Number?n+'px':n;},html='';return this.each(function(){if($('> iframe.bgiframe',this).length==0)this.insertBefore(document.createElement(html),this.firstChild);});}return this;};if(!$.browser.version)$.browser.version=navigator.userAgent.toLowerCase().match(/.+(?:rv|it|ra|ie)[//: ]([/d.]+)/)[1];})(jQuery);

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如果仅仅是做网页,HTML就够了.JS可以实现一些动态效果和功能,也是网页中很常见的,但不是必须的.另外,如果想网页表现力强,CSS也是非常主要的组成部分.