一、實現效果：
註：此時滑鼠還沒移進紅色框，紅色框內的內容隱藏起來了
註：此時滑鼠移到紅色框地區內了，內部隱藏的東西顯示出來了
二、css控制具體代碼：
<span style="color:#330033;"><html><head><title>測試對象轉數組</title><style>.FontStyle{float:left;}.wrap{float:left;}.wrap{border:1px solid white;width:250px;height:20px;margin-left:3px;}.wrap:hover span{display:block;margin-right:10px;}.wrap span{display:none;float:left;}</style></head><body><div class="FontStyle">hi,i am here： </div><div class="wrap"> <span class="label label-primary bstreeadd">添加</span> <span class="label label-primary bstreeedit">修改</span> <span class="label label-danger bstreedel">刪除</span></div></body></html></span>
代碼中需要注意的：如果發現添加、修改、刪除三個選項卡不在一行，將width屬性適度調大點。
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