动态绑定事件：

$("input[name='username']").unbind("blur");        $("input[name='username']").bind("blur", function(){               user.checkUser($(this).val());        });

ajax请求：

$.ajax({            type:"POST",            cache: false,            url:'userJSONAction_checkUsername.action',            data:parameter,            beforeSend: function(XMLHttpRequest){                alert("请求将要开始,我们可以在此处显示加载条");            },            success:function(data){                alert(data);            },            complete: function(XMLHttpRequest, textStatus){                alert("请求完毕了,我们可以隐藏加载条 ");            },            error:function(XMLHttpRequest){                alert("请求失败了   "+XMLHttpRequest.status);            }        });        $.post("menuitemAction_showMenuitemsByPid.action", parameter, function(data){            tree.zTree = $("#tree").zTree(tree.setting, data.menuitemList);        });

页面加载时执行：

$().ready(function(){    alert('asdf');});$(function(){      alert('asdf');});

jquery之for循环：

$("#colors a").each(function(){    $(this).attr("class","changToWhite");});