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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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1、简单数组简单排序
<script type="text/javascript">
var arrSimple=new Array(1,8,7,6);
arrSimple.sort();
document.writeln(arrSimple.join());
</script>
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2、简单数组自定义排序
<script type="text/javascript">
var arrSimple2=new Array(1,8,7,6);
arrSimple2.sort(function(a,b){
return b-a});
document.writeln(arrSimple2.join());
</script>
解释：a,b表示数组中的任意两个元素，若return > 0 b前a后；reutrn < 0 a前b后；a=b时存在浏览器兼容
简化一下：a-b输出从小到大排序，b-a输出从大到小排序。
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3、简单对象List自定义属性排序
<script type="text/javascript">
var objectList = new Array();
function Persion(name,age){
this.name=name;
this.age=age;
}
objectList.push(new Persion(\'jack\',20));
objectList.push(new Persion(\'tony\',25));
objectList.push(new Persion(\'stone\',26));
objectList.push(new Persion(\'mandy\',23));
//按年龄从小到大排序
objectList.sort(function(a,b){
return a.age-b.age});
for(var i=0;i<objectList.length;i++){
document.writeln(\'<br />age:\'+objectList[i].age+\' name:\'+objectList[i].name);
}
</script>
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4、简单对象List对可编辑属性的排序
<script type="text/javascript">
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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