<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>IE半透明</title>
<style>
div{
width:200px;
height: 200px;
border:1px solid #333;
background:rgba(0,0,0,0.5);
filter:progid:DXImageTransform.Microsoft.gradient(startcolorstr=#7F000000,endcolorstr=#7F000000);
/*
ie低版本适配
7F 为透明度的值，后面为16进制颜色值
透明度的取值0~255
然后转16进制
127为半透明转16进制为7F
*/
}
</style>
</head>
<body>
<div>
</div>
</body>
</html>
