(function($){ 
  $.fn.hoverDelay = function(options){ 
    var defaults = { 
      hoverDuring: 200, 
      outDuring: 200, 
      hoverEvent: function(){ 
        $.noop(); 
      }, 
      outEvent: function(){ 
        $.noop(); 
      } 
    }; 
    var sets = $.extend(defaults,options || {}); 
    var hoverTimer, outTimer; 
    return $(this).each(function(){ 
      $(this).hover(function(){ 
        clearTimeout(outTimer); 
        hoverTimer = setTimeout(sets.hoverEvent, sets.hoverDuring); 
      },function(){ 
        clearTimeout(hoverTimer); 
        outTimer = setTimeout(sets.outEvent, sets.outDuring); 
      }); 
    }); 
  } 
})(jQuery); 

$("#test").hoverDelay({ 
  hoverDuring: 1000, 
  outDuring: 1000, 
  hoverEvent: function(){ 
    $("#tm").show(); 
  }, 
  outEvent: function(){ 
    $("#tm").hide(); 
  } 
}); 

$("#test").hoverDelay({ 
  hoverEvent: function(){ 
    alert("经过 我！"); 
  } 
});