ASP.NET Ajax 控件DropShadow,DropDown CollapsiblePanel

<ajaxToolkit:CollapsiblePanelExtender ID="cpe" runat="Server"
TargetControlID="Panel1"
CollapsedSize="0"
ExpandedSize="300"
Collapsed="True"
ExpandControlID="LinkButton1"
CollapseControlID="LinkButton1"
AutoCollapse="False"
AutoExpand="False"
ScrollContents="True"
TextLabelID="Label1"
CollapsedText="Show Details..."
ExpandedText="Hide Details"
ImageControlID="Image1"
ExpandedImage="~/images/collapse.jpg"
CollapsedImage="~/images/expand.jpg"
ExpandDirection="Vertical" />

<ajaxToolkit:DropDownExtender runat="server" ID="DDE"
TargetControlID="TextLabel"
DropDownControlID="DropPanel" />