ajax 使数据置顶解决方案
ajax 使数据置顶
ajax 上移用before 下移用after 置顶 用什么啊？
------解决思路----------------------
jquery的话获取第一个元素用before就行了
变量命名的话置顶叫top就行了
这些跟ajax有关系吗，搞清楚ajax是什么再来。。。
------解决思路----------------------
这个与ajax没有关系。置顶是获取第一个元素。
------解决思路----------------------
这个没有关系，直接用JQuery实现就可以了
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