.balloonstyle{
 filter:alpha(opacity=90); /* per IE/WIN */
 opacity: 0.90;
 position:absolute;
 top: -500px;
 left: 0;
 padding: 5px;
 visibility: hidden;
 border:1px solid;
 z-index: 100;
 background-color: #F7F7F7;
 width: 290px;
 border-color: #CCCCCC;
}

#arrowhead{
z-index: 99;
position:absolute;
top: -500px;
left: 0;
visibility: hidden;
}