java web - js控制代码块的替换

//javascript
function deleimg()
{
document.getElementById("yingye").style.display="";
document.getElementById("yingyereset").style.display="none";
/*  document.getElementById("docfile").value=""; */
}

//jsp
<tr>
<th>营业执照</th>
<td id="yingye" style="display:none;">
<input   name='file' id='yingyezhizhao'   type=file class="text_172" onchange="fileChange(this.value);" accept=".gif,.jpg,.jpeg,.png">
</td>
<td id="yingyereset" >
<img src="<%=request.getAttribute("filepath") %>" border=0 height="300" width="300" />
<a href="#" onclick="deleimg();"><img src="../images/btn/btn_04.gif" alt="重置" /></a>  
</td>
<td  colspan="2"><div id="yingyezhizhaoTip" style="width:150px"></div></td>
</tr>