AnimationExtender 淡入淡出onload

 <asp:AnimationExtender ID="Menu1_AnimationExtender" runat="server" TargetControlID="Panel1">   
          <Animations>  
             <OnLoad>  
                <Sequence>   
                  <FadeIn AnimationTarget="Panel1" Duration="5" Fps="20" maximumOpacity="0.8" minimumOpacity="0.1">
                  </FadeIn>
                 </Sequence>  
               </OnLoad>  
              </Animations>     
           </asp:AnimationExtender>