指定变形中心点CSS3

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>指定变形中心点</title>
     <style type="text/css">
        /*基本设置*/

body{margin:0;padding:0;font-size:12px;font-family:Arial,"宋体";backgorund:#fff;}/*文档清零,字体,字号,背景设置.*/

div,ul,li,p,form,h1,h2,h3,h4,h5,input,dl,dt,dd,fieldset,table,tr,td{margin:0;padding:0;}/*边界元素清零*/

ul,li,ol{list-style:none;}/*去除列表符号*/

img{border:none;}/*去除图片按钮边框*/

a{text-decoration:none;}/*去除超链接下划线*/
img,input,textarea{vertical-align:middle;}
        div {
            position:absolute;
            90px;
            height:90px;
            background-color:#e4105e;
            border:2px solid #000000;
            margin:30px;
        }
         div.a {
         left:30px;
         top:30px;
        }
         div.b {
         left:30px;
         top:150px;
        }
          div.c {
         left:30px;
         top:270px;
        }
</style>
</head>
<body>
<div class="a">为变换之前</div>
<div class="a" style=" background:#b6ff00;
         -moz-transform-origin:left top;-moz-transform:rotate(-25deg);
         -webkit-transform-origin:left top;-webkit-transform:rotate(-25deg);
         -o-transform-origin:left top;-webkit-transform:rotate(-25deg);">左上角为变形中心</div>

<div class="b">为变换之前</div>
<div class="b" style="background:#266c9b;
         -moz-transform-origin:right bottom;-moz-transform:rotate(75deg);
         -webkit-transform-origin:right bottom;-webkit-transform:rotate(75deg);
         -o-transform-origin:right bottom;-webkit-transform:rotate(75deg);">右下角为变形中心</div>

<div class="c">为变换之前</div>
<div class="c" style="background:#ff6a00;
-moz-transform-origin:right center;-moz-transform:rotate(-90deg);
-webkit-transform-origin:right center;-webkit-transform:rotate(-90deg);
-o-transform-origin:right center;-o-transform:rotate(-90deg);
">右边界中间为变形中心点</div>

</body>
</html>