var as = [1,2,11,3434,3,4545,33,55,0];
as.sort(); //這個排序是按照字典排序
//自定義按照數字排序
function sortByNum(a,b){
return parseInt(a) - parseInt(b);
}
as.sort(sortByNum);
//按照對象來排序
//定義一個person對象
function Person(name.age){
this.name=name;
this.age=age;
}
var p1 = new Person("zhang1",11);
var p2 = new Person("zhang2",1);
var p3 = new Person("zhang3",18);
var p4 = new Person("zhang4",13);
var ps = [p1,p2,p3,p4];
function sortByName(obj1,obj2){
 if(obj1.name>obj2.name){return 1}
 else if(obj1.name==obj2.name){return 0}
 else{return -1}
 }
function sortByAge(obj1,obj2){
 return obj1.age - obj2.age;
 }
 ps.sort(sortByName) //按照名字排序
 ps.sort(sortByAge) //按照年齡排序

function sortByProperty(proName){
var sortFun = function(obj1,obj2){
if(obj1[proName]>obj2[proName]) {return 1}
else if(obj1[proName]==obj2[proName]) {return 0}
else {return -1}
}
return sortFun;
}