ajax随笔（局部刷新）

$(function() {
    $("#menu a").live("click", function() {
        var isLeaf = true;
        if ($(this).parent().parent().hasClass("nav")) {
            if ($(this).parent().find('ul').hasClass("subnav")) { isLeaf = false; alert("cuole"); }
            else { isLeaf = true; alert("duile"); }
        } else {
            isLeaf = true;
        }
        if (isLeaf) {
            $("#content").html('<img src="../images/loading.gif"  vspace=100 hspace=245>');
            var navId = $(this).attr("id");
            $.getScript("../js/student/" + navId.substring(4, navId.length) + ".js");
            setLocation(navId);
        }
    });
    var location = getLocation();
    $("#" + location).trigger("click");
});