<script>
function change()
{
var pic=document.getElementsById("upfile").value;
document.getElementById("imgid").src=pic;
}
</script>
<tr bgcolor="#f5f5f5">
<td height="30" align="center" valign="middle">图片链接</td>
<td height="35" align="center" valign="middle"><input type="file" name="upfile" runat="server" id="upfile" onChange="change()">
</td>
</tr>
<tr bgcolor="#f5f5f5">
<td height="70" align="center" valign="middle">缩略图</td>
<td height="70" align="center" valign="middle"><img id="imgid" width="82" height="65" border="0" >
</td>
</tr>