IE6下margin无效

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
* {
    margin:0;
    padding:0;
}
.container {
    margin:20px;
    border:1px dotted black;
    background:#f2ffbf;
}
.box-model {
    width:100px;
    height:100px;
    margin:10px;
    background:#cf0;
    border:1px dotted black;
}
</style>
</head>
<body>
<div class="container">
  <div class="box-model">box-a</div>
  <div class="box-model">box-b</div>
  <div class="box-model">box-c</div>
</div>
</body>
</html>

解决办法：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
* {
    margin:0;
    padding:0;
}
.container {
    margin:20px;
    border:1px dotted black;
    background:#f2ffbf;
    zoom:1;
}
.box-model {
    width:100px;
    height:100px;
    margin:10px;
    background:#cf0;
    border:1px dotted black;
}
</style>
</head>
<body>
<div class="container">
  <div class="box-model">box-a</div>
  <div class="box-model">box-b</div>
  <div class="box-model">box-c</div>
</div>
</body>
</html>

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原文地址：https://www.cnblogs.com/BigIdiot/p/3032227.html