#bubble_tooltip{  
    text-align: center;
    color: black;
    width: 150px;
    position: absolute;
    display: none;            
    background-color:#cecece;
    color: black;
    border: 1px solid #737274;   
}
#bubble_tooltip .bubble_top{   
    height:0px;    
}
#bubble_tooltip .bubble_middle{                    
    background-position:bottom left;
    padding:5px; 
    margin-bottom: 0px;   
}
#bubble_tooltip .bubble_middle span{
    position:relative;
    top:0px;
    font-family: Trebuchet MS, Lucida Sans Unicode, Arial, sans-serif;
    font-size:11px;
}

#bubble_tooltip .bubble_bottom{
    height:0px;
    position:relative;
    top:0px;
}