高手看看，这段js代码如何有异常执行不起
高手看看，这段js代码怎么有错误执行不起
想实现的是一个页面设置3秒自动刷新，在打开输入框的层时就不刷新
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>111</title>
<script language="JavaScript" type="text/javascript">
function myrefresh(){
window.location.reload();
}
var obj=document.getElementById("closeshow");
if(obj.style.display=="none"){
setTimeout('myrefresh()',30000);
}
function showclose() {
var obj=document.getElementById("closeshow");
if(obj.style.display=="none"){
obj.style.display="block";
}else{
obj.style.display="none";
}
}
</script>
</head>
<body>
<div id="UpdatePanel2">
<table>
<tr>
<td width="100" height="30">在线问答：</td>
<td height="26" >
<a href="javascript:;" onclick="showclose();">【我要提问】</a></td>
<td width="150" height="26" align="right" nowrap="nowrap" style="padding-right: 10px;">
</td>
<td width="100" height="26" align="right" nowrap="nowrap" style="padding-right: 10px;">
<A href="javascript:location.reload();"><STRONG>刷 新</STRONG></A></td>
</tr>
</table>
</div>
<div id="closeshow" style="display: none;">
<div id="closewindow">
<div class="msg_block">
<table width="500" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" class="bk2">
<tr>
<td width="561" background="playimg/title_bg.jpg">
<strong> 我要提问</strong></td>
<td width="37" align="right" background="playimg/title_bg.jpg">
<a href="javascript:;" onclick="showclose();">关闭</a> </td>
</tr>
<tr>
<td colspan="2" align="center" valign="top" style="padding: 10px;">
<form action="" method="post" name="saypl" id="saypl">
<label><textarea name="saytext" rows="2" cols="20" id="saytext" style="height:97px;width:416px;"></textarea></label>
<p><label> <input name="imageField" type="submit" id="imageField" value=" 提 交 " />
</label></p>
</form>
</td>
</tr>
</table>
</div>
</div>
<div id="graydiv">
</div>
</div>
</body>
想实现的是一个页面设置3秒自动刷新，在打开输入框的层时就不刷新
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>111</title>
<script language="JavaScript" type="text/javascript">
function myrefresh(){
window.location.reload();
}
var obj=document.getElementById("closeshow");
if(obj.style.display=="none"){
setTimeout('myrefresh()',30000);
}
function showclose() {
var obj=document.getElementById("closeshow");
if(obj.style.display=="none"){
obj.style.display="block";
}else{
obj.style.display="none";
}
}
</script>
</head>
<body>
<div id="UpdatePanel2">
<table>
<tr>
<td width="100" height="30">在线问答：</td>
<td height="26" >
<a href="javascript:;" onclick="showclose();">【我要提问】</a></td>
<td width="150" height="26" align="right" nowrap="nowrap" style="padding-right: 10px;">
</td>
<td width="100" height="26" align="right" nowrap="nowrap" style="padding-right: 10px;">
<A href="javascript:location.reload();"><STRONG>刷 新</STRONG></A></td>
</tr>
</table>
</div>
<div id="closeshow" style="display: none;">
<div id="closewindow">
<div class="msg_block">
<table width="500" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" class="bk2">
<tr>
<td width="561" background="playimg/title_bg.jpg">
<strong> 我要提问</strong></td>
<td width="37" align="right" background="playimg/title_bg.jpg">
<a href="javascript:;" onclick="showclose();">关闭</a> </td>
</tr>
<tr>
<td colspan="2" align="center" valign="top" style="padding: 10px;">
<form action="" method="post" name="saypl" id="saypl">
<label><textarea name="saytext" rows="2" cols="20" id="saytext" style="height:97px;width:416px;"></textarea></label>
<p><label> <input name="imageField" type="submit" id="imageField" value=" 提 交 " />
</label></p>
</form>
</td>
</tr>
</table>
</div>
</div>
<div id="graydiv">
</div>
</div>
</body>