JQUERY Live Hover

//菜单效果            $(".hmain").live('mouseenter', function() {                $(this).css("background-image", "url(images/menutwo.jpg)");                $(this).children("a").css("color", "#FFFFFF");                if ($.browser.mozilla) {                    $(this).children("ul").children("li").children("a").css("width", "89px");                }                $(this).children("ul").show();            }).live('mouseleave', function() {                $(this).css("background-image", "url(images/menuone.jpg)")                $(this).children("a").css("color", "#000000");                $(this).children("ul").hide();            });