placing the mouse over effect for the images in the gridview

 Hi,
I have write the code to display the images in the gridview by placing the image button in the templet filed. but i want to place the mouse over effets on the images just like youtube. Is it possible to place the java script in side the gridviwe. how can i  please tell me.

<asp:GridView ID="GridViewVideos" runat="server" AutoGenerateColumns="False" DataKeyNames="ID"
                                                                 Width="100%" BorderColor="" GridLines="None" OnSelectedIndexChanged="GridViewVideos_SelectedIndexChanged">
 & ...