NUMBER ARRAY:
var numSort=[34,12,54,14];
小--->大
numSort.sort(function(a,b){
return a-b;
}); //[12,14,34,54]
大--->小
numSort.sort(function(a,b){
return b-a;
}); //[54,34,14,12]
小--->大
OBJECT ARRAY:
var objSort=[{age:24},{age:12},{age:23}];
objSort.sort(function(a,b){
return a.age - b.age;
}); //[{age:12},{age:23},{age:24}]
大--->小
var objSort=[{age:24},{age:12},{age:23}];
objSort.sort(function(a,b){
return b.age - a.age;
}); //[{age:24},{age:23},{age:12}]