请能告诉我这几行代码上写的两个层不能紧贴在一起

[yemingwy]

请能告诉我这代码上写的两个层不能紧贴在一起

<style type="text/css">
.download_middle
{
width:540px;
}

.download_middle .middle_left
{
float:left;
width:185px;
border:1px solid red;
}

.download_middle .middle_right
{
width:348px;
border:1px solid green;
margin-left:185px;
}
</style>

<div class="download_middle">
<div class="middle_left">

</div>
<div class="middle_right">

</div>
</div>

[nicholsky]

两者都浮动，否则ie6下会有一条天之痕。

<style type="text/css">
.download_middle
{
width:540px;
}

.download_middle .middle_left
{
float:left;
width:185px;
border:1px solid red;
}

.download_middle .middle_right
{
width:348px;
border:1px solid green;
float:left;
}
</style>

<div class="download_middle">
<div class="middle_left">

</div>
<div class="middle_right">

</div>
</div>