$(document).ready(function () {  
    //對json進行降序排序函式  
    var colId="age"  
    var desc = function(x,y)  
    {  
        return (x[colId] < y[colId]) ? 1 : -1  
    }  
    //對json進行升序排序函式  
    var asc = function(x,y)  
    {  
        return (x[colId] > y[colId]) ? 1 : -1  
    }  
    var arr2 = [  
        {name:"kitty", age:12},  
        {name:"sonny", age:9},  
        {name:"jake", age:13},  
        {name:"fun", age:24}  
    ];  
    document.writeln("按age進行升序排序：<br>");  
    arr2.sort(asc); //升序排序  
    document.writeln(JSON.stringify(arr2));  
  
  
    document.writeln("<br>按age進行降序排序：<br>");  
    arr2.sort(desc); //降序排序  
    document.writeln(JSON.stringify(arr2));  
  
});