function sort(){

var ary=[11,12,3,5,29];

ary.sort();//按照字符編碼排序11,12,29,3,5;

alert(ary.toString());

ary.sort(function(v1,v2){

return v1-v2;//自定義排序規則3,5,11,12,29

});

alert(ary.toString());

}