(function($) {
// plugin definition
$.fn.dropdown = function(options) {
	$this = $(this);
	
	$.fn.dropdown.defaults  = $.extend({}, $.fn.dropdown.defaults, options);
	var opt = $.fn.dropdown.defaults;
	$this.each(function(){
	$this.children("li").hover(
        function(){	    
	    //$(this).children("ul").clearQueue()
	    if(opt.effect_in == null)$(this).children("ul").css({"display":"block"});
            else eval( '$(this).children("ul").'+ opt.effect_in + '('+ opt.params_in +')');
        },
        function(){          
          $(this).children("ul").clearQueue().stop().css('opacity',1);
	  if(opt.effect_out == null)$(this).children("ul").css({"display":"none"});
          else eval( '$(this).children("ul").'+ opt.effect_out + '('+ opt.params_out+')');
        }
      );
	})
};
//
$.fn.dropdown.defaults = {
  effect_in : null,	
  params_in : '',
  effect_out : null,	
  params_out : ''
}
//
})(jQuery);