在线效果体验：http://hovertree.com/texiao/mobile/3.htm
请使用手机浏览器查看。
css代码：
.bg{ background:url(http://hovertree.com/texiao/mobile/3/hovertree01.jpg); filter:"progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale')"; -moz-background-size:100% 100%; background-size:100% 100%; }
HTML文件代码：
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <title>DIV缩放背景自适应(不变形)jQuery-HoverTree</title> <style type="text/css"> a { color: white; } body { font-family: 幼圆,宋体,'Times New Roman', Times, serif;color:white; } .picwidth { width: 100%; text-align: left; filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale')"; -moz-background-size: 100% 100%; background-size: 100% 100%; } body { margin: 0px; background-color: #120c0c; } .content { width: 206px; margin: 0px auto; padding-top: 10px; line-height: 16px; } .frame { width: 256px; margin: 0px auto; } </style> <script src="http://hovertree.com/ziyuan/jquery/jquery-2.1.4.min.js"></script> </head> <body> <div class="frame"> <div id="contentHead" style="height:231px;background-image:url(http://hovertree.com/texiao/mobile/3/hovertree01.jpg)" class="picwidth"> <input type="button" value="放大" id="keleyibig" /><input type="button" value="缩小" id="keleyismall" /><a href="http://hovertree.com/hvtart/bjae/f43r3qry.htm">原文</a> </div> <div id="contentBody" style="background-image:url(http://hovertree.com/texiao/mobile/3/hovertree02.jpg);height:99px;color:White;" class="picwidth"> <div class="content"> 今日人物： <div style="text-align:center">谢霆锋</div> <br />请点击放大,缩小按钮。 </div> </div> <div id="contentBottom" style="background-image:url(http://hovertree.com/texiao/mobile/3/hovertree03.jpg);height:124px" class="picwidth">DIV缩放背景自适应(不变形) <br />请使用支持HTML5的浏览器查看本页 <br /><a href="http://hovertree.com/texiao/">特效库</a> <a href="http://hovertree.com">首页</a> <a href="http://keleyi.com">柯乐义</a> <a href="http://hovertree.com/hvtart/bjae/f43r3qry.htm">原文</a></div> </div> <script> $(function () { $(".frame").width(300); var documentWidth = $(document.body).width(); if (documentWidth < 600) $(".frame").width(documentWidth); var cHead = $("#contentHead"); var cBody = $("#contentBody"); var cBottom = $("#contentBottom"); function setHeight() { cHead.height(((cHead.width() / 320) * 289)); cBody.height(((cBody.width() / 80) * 31)); cBottom.height(((cBottom.width() / 64) * 31)); } setHeight(); $("#keleyibig").on("click", function () { $(".frame").width($(".frame").width() + 50) setHeight(); }) $("#keleyismall").on("click", function () { $(".frame").width($(".frame").width() - 50) setHeight(); }) }) </script> </body> </html>
Web前端资源：http://www.cnblogs.com/jihua/p/webfront.html
这张图可作为手机屏幕背景