Question

如何点击button显示一个div，再点击就隐藏

Answer 1

<div>
                <asp:Button runat="server" ID="btn" Text="显示/隐藏"  
                    OnClick="btn_Click"  </asp:Button> 
           </div> 
           <div id="div" runat="server" visible="false" >
                  显示或隐藏区域
           </div>

后台cs
        protected void btn_Click(object sender, EventArgs e)
        {
            if (div.Visible)
            {
                div.Visible = false;
            }
            else
            {
                div.Visible = true;;
            }
        }