学步园

<div   style="position:relative;">   
	<select   style="width:118px;margin-left:-100px"   onchange="document.getElementById('box').value = this.value;">   
		<option   value='verylonglongvalue'>verylonglonglongkey</option>
		<option   value='测试'>测试</option>
	 </select>
     <input id="box" style="width:100px;position:absolute;left:0px;">   
</div>