nagaki

$('a').bind({
  mouseenter: function() {
    $(this).addClass('hover');
  },
  mouseleave: function() {
    $(this).removeClass('hover');
  }
});

nagaki

(function($){

  $.fn.offDayTime = function( options ) {
    // Extend settings
    var settings = $.extend({
      behavior  : 'hide',
      openTime  : 900,
      closeTime : 1700,
      closeDays : [0, 6] // 0:Sun, 6:Sat
    }, options);