摘要： 以前的兼容.transparent_class {-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; /* ie8 */filter:alpha(opacity=50); /* ie5-7 */ -moz-opacity:0.5; /* old mozilla browser like netscape */ -khtml-opacity: 0.5; /* for really really old safari */opacity: 0.5; /* css standard, currentl 阅读全文