html - 左右浮动表格有问题

Question

我在下面有一个 jsfiddle:

http://jsfiddle.net/C95uc/3/

我的 CSS 有问题。我想在左侧上方显示两个下拉菜单，并且想在右侧显示文本输入，但我该怎么做？

下面是html代码:

<div class='lt-container'>
<form id='moduleForm'>
<select name="module" id="modulesDrop">
<option value="">Please Select Module</option>
    </select>
    </form>
</div>




<div  class='lt-container' >
<form id='moduleExistForm'>
 <select name="module" id="modulesDrop">
<option value="">Please Select Course</option>
    </select> </form> 
</div>


<div  id='rt-container' >
<form id='detailsForm'>


    <table>
    <tr>
    <th></th>
    <td><input type='hidden' id='idmodule' name='moduleid' value='' /> </td>
    </tr>
    <tr>
    <th>Module ID:</th>
    <td><input type='text' id='nomodule' name='moduleno' readonly='readonly' value='' /> </td>
    </tr>
    <tr>
    <th>Module Name:</th>
    <td><input type='text' id='namemodule' name='modulename' readonly='readonly' value='' /> </td>
    </tr>
    <tr>
    <th>Credits:</th>
    <td><input type='text' id='credits' name='creditsname' readonly='readonly' value=''/> </td>
    </tr>
    </table>
    <div id='moduleAlert'></div>

    </form>



    </div>

CSS:

.lt-container, #rt-container {
 float: left;   
 }

#rt-container {
 clear: right;
 margin-left: 5%;    
}

Answer 1

http://jsfiddle.net/C95uc/4/

<div class='lt-container'>
<form id='moduleForm'>
<select name="module" id="modulesDrop">
<option value="">Please Select Module</option>
    </select>
    </form>

<form id='moduleExistForm'>
 <select name="module" id="modulesDrop">
<option value="">Please Select Course</option>
    </select> </form> 
</div>

两者都是 <select>同去<div class='lt-container'>