display:none显示后asp.net文本框值获取不到

Question

<div style="display:none;" >
<div id="login" class="login_box">
<div class="login_box_top"><img src="images/login_top.png" /></div>
<div class="login_box_center">
<span>电子邮箱</span>

<asp:TextBox ID="yhm" runat="server"></asp:TextBox>
<span>登录密码</span>

<asp:TextBox ID="mm2" runat="server" TextMode="Password"></asp:TextBox>

<p><span class="fr"><a href="#" class="blue">忘记密码？</a></span><input name="rememberUser" type="checkbox" id="rememberUser" checked="checked" style="vertical-align:middle;"><label for="rememberUser" style="vertical-align:middle;">记住我</label></p>

<asp:LinkButton ID="LinkButton2" runat="server" CssClass="login_submit"
onclick="LinkButton2_Click" >登陆</asp:LinkButton>
</div>
<div class="login_box_botom"><img src="images/login_bottom.png" /></div>
</div>
</div>
后台代码
protected void LinkButton2_Click(object sender, EventArgs e)
{

try
{

sql1 = "select Count(*) from hyb where yhm='" + yhm.Text + "' and mm='" + mm2.Text + "' ";
Response.Write(sql1);

int flag = db.GetOleReadNum(sql1);
if (flag == 0)
{
Response.Write(fun.ShowErr("用户名或密码不正确！"));
}
else
{
ypid = Convert.ToInt32(db.GetOneRs("select id from hyb where yhm='" + Request.Form["yhm"] + "'"));

Response.Cookies["yhm"].Value = Request.Form["yhm"];
Response.Cookies["yhm"].Expires = DateTime.Now.AddHours(3);
Response.Cookies["ypid"].Value = Convert.ToString(ypid);
Response.Cookies["ypid"].Expires = DateTime.Now.AddHours(3);
Response.Cookies["id"].Value = Convert.ToString(ypid);
Response.Cookies["id"].Expires = DateTime.Now.AddHours(3);

fun.NGotourl("登录成功。", "index.aspx");

}

}
catch (Exception ex)
{
Response.Write(ex.Message);

}
}
yhm.Text的值获取后怎么是空的，如果去掉display:none;那么可以获取值,非常急,请帮忙解答，非常感谢
我的QQ 52-52-89-759,谁能帮我解决，给50元回报

Answer 1

如果是服务器端获取，不应该会获取不到值。

如果是JS获取，确实会获取不到值。

你是不是有什么js代码，修改了yhm这个控件的值？

Answer 2

弱弱的问句 为什么要隐藏呢