背景图片自适应
1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>无标题文档</title> 6 <style> 7 div { 8 position: absolute; 9 width: 100%;10 height: 100%;11 z-index: -1;12 }13 img {14 position: fixed;15 }16 </style>17 </head>18 19 <body>20 <div><img src="http://i.imgur.com/CrbvIYj.jpg" style="max-width:90%" style="max-width:90%" alt="css笔记_html/css_WEB-ITnose" ></div>21 </body>22 </html>
元素自适应居中于网页
<!doctype html><html><head><meta charset="utf-8"><title>无标题文档</title><style>div { position: absolute; top: 50%; left: 50%; width: 200px; height: 200px; margin: -100px 0 0 -100px; border: 1px solid yellow; background-color: #F6C;}</style></head><body><div></div></body></html>
CSS3使图片变灰
1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <meta http-equiv="X-UA-Compatible" content="IE=edge"> 6 <meta name="viewport" content="width=device-width, initial-scale=1"> 7 <title>test</title> 8 <style type="text/css"> 9 .gray {10 -webkit-filter: grayscale(100%);11 -moz-filter: grayscale(100%);12 -ms-filter: grayscale(100%);13 -o-filter: grayscale(100%);14 filter: grayscale(100%);15 filter: gray;16 }17 img {18 width: 200px;19 height: 200px;20 }21 </style>22 </head>23 <body>24 <img src="http://i.imgur.com/CrbvIYj.jpg" alt="css笔记_html/css_WEB-ITnose" >25 <img src="http://i.imgur.com/CrbvIYj.jpg" class="gray" alt="css笔记_html/css_WEB-ITnose" >26 </body>27 </html>
