<style type="text/css">
.MyImageButton
{
    cursor: hand;
}
.EditFormHeader td
{ 
    font-size: 14px;
    padding: 4px !important;
    color: #0066cc;
}   
</style>

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
    <script type="text/javascript">
        function RowDblClick(sender, eventArgs) {
            sender.get_masterTableView().editItem(eventArgs.get_itemIndexHierarchical());
        }
    </script>
</telerik:RadCodeBlock>