属性placeholder可以设置TextBox 提示信息如: <asp:TextBox ID ="txt1" runat ="server" ToolTip ="123" Wrap ="true" placeholder="跟踪号/订单号" ></asp:TextBox>
属性placeholder可以设置TextBox 提示信息如: <asp:TextBox ID ="txt1" runat ="server" ToolTip ="123" Wrap ="true" placeholder="跟踪号/订单号" ></asp:TextBox>