.ToolText{position:relative; color: #0033ff;} 
.ToolTextHover{position:relative;} 
.ToolText span{display: none;} 

.ToolTextHover span{ 
  display:block; 
  position:absolute; 
  border:1px solid black; 
  top:1.3em; 
  left:5px; 
  background-color:gray; color:white; 
  text-align: center; 
  
}