设置文件上传个数的效果

<style type="text/css">td {
	font-size:9pt
}
a {
	color:#000000;
	text-decoration:none
}
a:hover {
	text-decoration:underline
}
.tx {
	height:16px;
	width:30px;
	border-color:black black #000000;
	border-top-width:0px;
	border-right-width:0px;
	border-bottom-width:1px;
	border-left-width:0px;
	font-size:9pt;
	background-color:#eeeeee;
	color:#0000FF
}
.bt {
	font-size:9pt;
	border-top-width:0px;
	border-right-width:0px;
	border-bottom-width:0px;
	border-left-width:0px;
	height:16px;
	width:80px;
	background-color:#eeeeee;
	cursor:hand
}
.tx1 {
	height:20px;
	width:30px;
	font-size:9pt;
	border:1px solid;
	border-color:black black #000000;
	color: #0000FF
}
</style>
<form name="form1" method="post" action="upfile.asp" enctype="multipart/form-data">
	<input type="hidden" name="act" value="upload">
	<table width="71%" border="1" cellspacing="0" cellpadding="5" align="center" bordercolordark="#CCCCCC" bordercolorlight="#000000">
	<tr align="left" valign="middle" bgcolor="#eeeeee">
		<td bgcolor="#eeeeee" height="92">
			<script language="javascript">
			 function setid()
			 {
				str = '';
				if (!window.form1.upcount.value) window.form1.upcount.value = 1;
				for (i = 1; i <= window.form1.upcount.value; i++) 
				str += '文件' + i + ': <input type = "file" name = "file' + i + '" style = "width: 400" class = "tx1" > ';
				window.upid.innerHTML = str + '';
			 }
			</script>
			<li> 需要上传的个数 <input type="text" name="upcount" class="tx" value="1"><input type="button" name="Button" class="bt" onclick="setid();" value="· 设定 ·"></li>
			<li>上传到: <input type="text" name="filepath" class="tx" style="width:350" value=""></li>
		</td>
	</tr>
	<tr align="center" valign="middle">
		<td align="left" id="upid" height="122">
			 文件1: <input type="file" name="file1" style="width:400" class="tx1" value="">
		</td>
	</tr>
	<tr align="center" valign="middle" bgcolor="#eeeeee">
		<td bgcolor="#eeeeee" height="24">
			<input type="submit" name="Submit" value="·' 提交 ·" class="bt"><input type="reset" name="Submit2" value="·' 重执 ·" class="bt">
		</td>
	</tr>
	</table>
</form>