----------------------ModalPopupExtender
D:\sourceforge\asp.net\AjaxControlToolkit_net20\SampleWebSite\ModalPopup\ModalPopup.aspx
// linkbutton1增加扩展ModalPopupExtender属性:
<asp:LinkButton ID="LinkButton1" runat="server" Text="Click here to change the paragraph style" />
<ajaxToolkit:ModalPopupExtender ID="ModalPopupExtender" runat="server"
TargetControlID="LinkButton1"
PopupControlID="Panel1"
BackgroundCssClass="modalBackground"
OkControlID="OkButton"
OnOkScript="onOk()"
CancelControlID="CancelButton"
DropShadow="true"
PopupDragHandleControlID="Panel3" />
CancelControlID: 取消按钮,CancelButton
OkControlID: 确定按钮,OkButton
OnOkScript:当点击确定执行的脚本,onOk()
PopupDragHandleControlID:拖动弹出框的控件ID, Panel3
TargetControlID:调用目标控件，LinkButton1,点击这个即弹出pop
// 这里面有一个隐藏的按钮作为调用target, 服务器:this.programmaticModalPopup.Show();即显示modalpop
<asp:Button runat="server" ID="hiddenTargetControlForModalPopup" style="display:none"/>
<ajaxToolkit:ModalPopupExtender runat="server" ID="programmaticModalPopup"
BehaviorID="programmaticModalPopupBehavior"
