IE6下兼容性常见的几个问题与解决方法

.box{width:400px;}
.left{width:200px;height:210px;background:red;float:left}
.right{width:200px;float:right;overflow:hidden;}
.div{width:180px;height:180px;background:blue;padding:25px;}

<div class="box">
 <div class="left"></div>
 <div class="right">
  <div class="div"></div>
 </div>
</div>

.box{width:400px;}
.left{background:red;float:left;}
.right{background:blue;float:right;}
h3{height:30px;float:left;}

 <div class="box">
   <div class="left">
      <h3>左侧</h3>
   </div>
   <div class="right">
      <h3>右侧</h3>
   </div>
</div>

.box{height:2px;background:red;overflow:hidden}
<div class="box"></div>

.box{width:100px;height:100px;border:1px dotted red;margin:100px auto;}
        
<div class="box"></div>

.box{background:red;border:1px solid red;zoom:1;
/*padding:1px;*/}
.div{width:200px;height:200px;background:blue;margin:100px}

<div class="box">
 <div class="div"></div>
</div>

.box{width:200px;height:200px;background:red;float:left;margin:100px;display:inline;}
        
<div class="box"></div>

.box{float:left;border:10px solid #000;width:600px;}
.box div{
    width:100px;height:100px;background:red;margin:20px;
    border:5px solid blue;float:left;display:inline;
}
<div class="box">
      <div>1</div>
      <div>2</div>
      <div>3</div>
      <div>4</div>
      <div>1</div>
      <div>2</div>
      <div>3</div>
      <div>3</div>
</div>

ul{width:}
li{list-style:none;height:30px;border:1px solid #000;
/*vertical-align:top*/;float:left;}
a{width:100px;height:30px;float:left;background:red;}
span{width:100px;height:30px;float:right;background:blue;}

<ul>
    <li>
        <a href="#"></a>
        <span></span>
    </li>
    <li>
        <a href="#"></a>
        <span></span>
    </li>
    <li>
        <a href="#"></a>
        <span></span>
    </li>
    <li>
        <a href="#"></a>
        <span></span>
    </li>
    <li>
        <a href="#"></a>
        <span></span>
    </li>
<ul>