插件描述：让ie6也完美支持IE圆角/阴影等CSS3样式
.cr {
/*circle radius*/
border: 1px solid#ccc; – webkit – border – radius: 8px; – moz – border – radius: 8px;
border – radius: 8px;
behavior: url(css / PIE.htc);
}
.bs {
/*
一般情况：inset x-offset y-offset blur-radius spread-radius color，
【spread-radius扩展半径】来控制阴影的扩展方向：扩展半径有两个值，如果取值为正值，则个阴影会向外扩展，如果你给其取负值，整个阴影向内缩小。
*/
/* x-offset, y-offset, blur,和 color。*/
– webkit – box – shadow: 1px 1px 10px#aaa; – moz – box – shadow: 1px 1px 10px#aaa;
box – shadow: 1px 1px 10px#aaa; – pie – background: linear – gradient(#fff, #fff);
/*gradient为渐变，现在设为白色，不然会变黑，见http://css3pie.com/*/
behavior: url(css / PIE.htc);
}
.bsrgb {
– webkit – box – shadow: 1px 1px 25px rgba(135, 135, 135, 0.96);
– moz – box – shadow: 1px 1px 25px rgba(135, 135, 135, 0.96);
box – shadow: 1px 1px 25px rgba(135, 135, 135, 0.96);
– pie – background: linear – gradient(#fff, #fff);
/*gradient为渐变，现在设为白色，不然会变黑，见http://css3pie.com/*/
behavior: url(css/PIE.htc);
}