jquery on绑定hover

$(document).ready(function()...{ 
    $('.some-class').on(...{ 
        mouseenter: function(e) ...{ 
        // Hover event handler 
        alert("hover"); 
        }, 
        mouseleave: function(e) ...{ 
        // Hover event handler 
        alert("hover"); 
        } 
      },'.addElement'); 
});