Keyboard accessible dropdown menu.

accessibleDropdown.coffee

$.fn.accessibleDropDown = ->
    el = $(this);
    enter = -> $(this).addClass('hover')
    leave = -> $(this).removeClass('hover')
    # Hover dropdown
    $("li", el).hoverIntent(enter,leave)

    # Make dropdown menus keyboard accessible
    $("a", el).focus( ->
        $(this).parents("li").addClass("hover");
    ).blur ->
        $(this).parents("li").removeClass("hover");