Object data sorting

A data element is an object, how to sort through the different values ​​of K it

    var o1 = {name:'jhon',age:22};
        var o2 = {name:'frank',age:30};
        var o3 = {name:'hehe',age:15};
        var ol = [o1,o2,o3];
        function compareByKey(prop){
            return function(item1,item2){
                var value1 = item1[prop];
                var value2 = item2[prop];
                if(value1<value2){
                    return -1;
                }
                else if(value1==value2){
                    return 0;
                }
                else{
                    return 1;
                }
                
            }
        }
        var fun = compareByKey("age");
        ol.sort(fun)