Array.sort()方法是用来对数组项进行排序的 ，默认情况下是进行升序排列。sort() 方法可以接受一个 方法为参数。
sort()排序时每次比较两个数组项都回执行这个参数，并把两个比较的数组项作为参数传递给这个函数。当函数返回值为1的时候就交换两个数组项的顺序，否则就不交换。
var p = [5, 2, 3, 1, 7, 5, 6, 9, 6, 0]; function down(a, b) { return (a < b) ? 1 : -1 } p.sort(down) alert(p)json排序
var p = [ {name:"kitty", age:12}, {name:"sonny", age:9}, {name:"jake", age:13}, {name:"fun", age:24} ] function down(x, y) { return (x.age < y.age) ? 1 : -1 } p.sort(down) var $text = "<div>" $.each(p, function (key, value) { var $div = "<div>" $.each(value, function (key, value) { $div += "<span>" + key + ":</span>" + "<span>" + value + "</span>" + " " }) $div += "</div>" $text = $text + $div }) $text += "</div>" $(".text").html($text)写成类
<script type="text/javascript"> $(document).ready(function () { var p = [ {name:"kitty", age:12, price:190}, {name:"sonny", age:9, price:390}, {name:"jake", age:13, price:42}, {name:"fun", age:24, price:210} ] var tablesort = { init:function (arry, parm, sortby) { this.obj = arry this.parm = parm this.b = sortby }, sot:function () { var $this = this var down = function (x, y) { return (eval("x." + $this.parm) > eval("y." + $this.parm)) ? -1 : 1 }//通过eval对json对象的键值传参 var up = function (x, y) { return (eval("x." + $this.parm) < eval("y." + $this.parm)) ? -1 : 1 } if (this.b == "down") { this.obj.sort(down) } else { this.obj.sort(up) } },//排序 prin:function () { var $text = "<div>" $.each(this.obj, function (key, value) { var $div = "<div>" $.each(value, function (key, value) { $div += "<span>" + key + ":</span>" + "<span>" + value + "</span>" + " " }) $div += "</div>" $text = $text + $div }) $text += "</div>" $("html body").html($text) }//遍历添加dom元素，添加dom } function _temp() { this.init.apply(this, arguments) } _temp.prototype = tablesort; var sort1 = new _temp(p, "price", "down") //建立对象 sort1.init(p, "age", "up");//初始化参数更改 sort1.sot() sort1.prin() })</script>原文：http://www.cnblogs.com/WarBlog/p/5212078.html