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sort()对数组排序，不开辟新的内存，对原有数组元素进行调换
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var objectList2 = new Array();
function WorkMate(name,age){
this.name=name;
var _age=age;
this.age=function(){
if(!arguments)
{
_age=arguments[0];}
else
{
return _age;}
}
}
objectList2.push(new WorkMate('jack',20));
objectList2.push(new WorkMate('tony',25));
objectList2.push(new WorkMate('stone',26));
objectList2.push(new WorkMate('mandy',23));
//按年龄从小到大排序
objectList2.sort(function(a,b){
return a.age()-b.age();
});
for(var i=0;i<objectList2.length;i++){
document.writeln('<br />age:'+objectList2[i].age()+' name:'+objectList2[i].name);
}
</script>
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