$jQuery(document).ready(function() {

    MainNavigationIdentifier = "#MainNavigation li.Level1";
    SelectedBGImage = "";

    $jQuery(MainNavigationIdentifier).mouseover(function(e) {
    if ($jQuery(this).is('.Ancestor') == false) {
            SelectedBGImage = $jQuery(this).css('background-image');
            $jQuery("#MainNavigationBlock li.Ancestor ul.Level2").hide();
            $jQuery(this).css('background-image', 'url()');
            $jQuery(this).css('background-color', '#F1772C');
        }

    });

    $jQuery(MainNavigationIdentifier).mouseout(function(e) {
    if ($jQuery(this).is('.Ancestor') == false) {
            $jQuery("#MainNavigationBlock li.Ancestor ul.Level2").show();
            $jQuery(this).css('background-image', SelectedBGImage);


        }
    });

});