按照对象的属性值进行排序

    //按照对象的属性值排序
    var person =[
        {name:'Zach',age:26,tag:1},
        {name:'Tom',age:29,tag:2},
        {name:'Kate',age:30,tag:3},
        {name:'Gates',age:31,tag:4},
        {name:'Smith',age:22,tag:5},
        {name:'Jeny',age:20,tag:6}];
    var result;
    function compareFunc(propertyName) {
        return function(obj1,obj2) {
            var val1,val2;
            val1 = obj1[propertyName];
            val2 = obj2[propertyName];
            if(val1 < val2) {
                return -1;
            }else if(val1 > val2) {
                return 1;
            }else {
                return 0;
            }
        }
    }
    result = person.sort(compareFunc('age'));
    alert(person[0].name);
    */