如何改变表格的style???
<script language="javascript">
var nextHiddenIndex = 3;
function AddFileInput()
{ylib_getObj("Fileinput" + nextHiddenIndex).style.display ="block";
nextHiddenIndex++;
if(nextHiddenIndex >= 8) ylib_getObj("attachMoreLink").style.display = "none";
}
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<table style="MARGIN:1em 0px">
<tr valign="top" id="Fileinput1">
<td><b>文件1:</b></td>
<td><INPUT id="File1" type="file" size="50" name="File1" runat="server"></td>
</tr>
<tr valign="top" id="Fileinput2">
<td><b>文件2:</b></td>
<td><INPUT id="File2" type="file" size="50" name="File2" runat="server"></td>
</tr>
<tr valign="top" id="Fileinput3" style="DISPLAY:none">
<td><b>文件3:</b></td>
<td><INPUT id="File3" type="file" size="50" name="File3" runat="server"></td>
</tr>
<tr valign="top" id="Fileinput4" style="DISPLAY:none">
<td><b>文件4:</b></td>
<td><INPUT id="File4" type="file" size="50" name="File4" runat="server"></td>
</tr>
<tr id="attachMoreLink">
<td><a href="javascript:AddFileInput()">附加更多文件</a></td>
</tr>
</table>
当点击“附加更多文件”时,应该显示上传文件框,但是现在就是没有反应,求各位大哥帮小弟看看函数AddFileInput()是不是写的不对,还是网页上有问题