为什么层显示不了

Question

我在后台代码里写的
private void LogonButton_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
DataSet Ds=new DataSet();
Ds=DA.Logon(UserID.Text,enc.Encrypt(UserPWD.Text));
if(Ds.Tables["My"].Rows.Count!=0)
{

MyCookie["UserID"]=Ds.Tables["My"].Rows[0]["U_ID"].ToString();
MyCookie["UserNAM"]=Ds.Tables["My"].Rows[0]["U_NAM"].ToString();
                Response.Write("<script language=javascript>");
Response.Write("ShowInfo.style.display='';");--显示页面里的层
Response.Write("function countdown(){");
Response.Write("location.href='UserServices/Checkreckoning.aspx'}");
Response.Write("setTimeout('countdown()',5000);");
Response.Write("</script>");
}
---层<DIV id="ShowInfo" style="BORDER-RIGHT: 1px ridge; BORDER-TOP: 1px ridge; DISPLAY: none; Z-INDEX: 3; LEFT: 360px; BORDER-LEFT: 1px ridge; WIDTH: 250px; PADDING-TOP: 10px; BORDER-BOTTOM: 1px ridge; POSITION: absolute; TOP: 150px; HEIGHT: 60px; BACKGROUND-COLOR: #eeeeee">
<TABLE align="center" border="0">
<TBODY>
<TR>
<TD vAlign="middle">
</TD>
<TD style="FONT-SIZE: 12px" vAlign="middle">身份验证成功，转入中......</TD>
</TR>
</TBODY>
</TABLE>
</DIV>



}大家帮我看以下代码错在哪？急