imagebutton控件的问题求教！
想鼠标放到imagebutton上面就更换图片，是用onmouseover然后在JS中写个function对吧。但是我的imagebutton控件是在datalist中的，在实际测试中鼠标放到imagebutton并没有反应。这是怎么回事。我在单独的测试imagebutton都可以变化图片的。

<asp:DataList ID="DataList1" runat="server" RepeatColumns="1">

            <ItemTemplate>

                <table style="width:100%;">

                    <tr>

                        <td colspan="2">

                            <asp:Label ID="Label1" runat="server"  Text='<%# Eval("ProductName") %>'></asp:Label>

                        </td>

                    </tr>

                    <tr>

                        <td rowspan="8">

                            <asp:Image ID="Image1" runat="server" ImageUrl='<%# Eval("Imgurl") %>' />

                        </td>

                        <td>

                            商品ID：<asp:Label ID="Label2" runat="server"    Text='<%# Eval("ProductID") %>'></asp:Label>

                        </td>

                    </tr>

                    <tr>

                        <td>

                            价格： ￥<asp:Label ID="Label3" runat="server"    Text='<%# Eval("Price") %>'></asp:Label>

                        </td>

                    </tr>

           &nb