<Style x:Key="NormalMouseButton" TargetType="Button">

    <Setter Property="OverridesDefaultStyle" Value="True" />

    <Setter Property="Cursor" Value="Hand" />

    <Setter Property="Template">

        <Setter.Value>

            <ControlTemplate TargetType="Button">

                <Border Name="border" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}">

                    <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />

                </Border>

                <ControlTemplate.Triggers>

                    <Trigger Property="IsMouseOver" Value="True">

                        <Setter Property="Opacity" Value="0.8" />

                    </Trigger>

                </ControlTemplate.Triggers>

            </ControlTemplate>

        </Setter.Value>

    </Setter>

</Style>