提示文字

<input type="checkbox" onmouseover="getElementById('ts').style.display='block'" onmouseout="getElementById('ts').style.display='none'">
<div id="ts">hover 提示文字</div>

#ts{
  display:none;
  padding:10px;
  left:10px;
  width:200px;
  height:100px;
  background:#ccc;
}