摘要: static - default and this is the FLOW. relative - postition determined by first STATIC element. top、bottom、left、right 保持文档流,占空间——保留自己在z-index:0层的占位。通过 阅读全文
posted @ 2016-03-28 15:55 xixihuang 阅读(332) 评论(0) 推荐(0) 编辑