.infowindow_tab {
    position: absolute;
    top: -31px;
    left: 0;
    z-index: 2;
}

.infowindow_tab .tab {
    float: left;
    background: #EFEFEF;
    display: inline-block;
    padding: 3px 10px;
    border: 1px solid #777;
    border-left: none;
    border-bottom: none;
    height: 15px;
    line-height: 15px;
    color:#555555;
    border-bottom: 1px solid #CCCCCC;
    cursor:pointer;
    box-sizing: content-box;
        box-shadow: 0 -2px 8px -4px rgba(0,0,0,0.5) inset;
}

.infowindow_tab .tab:first-child {
    border-left: 1px solid #777;
}
.infowindow_tab .tab.active{
    background: white;
    color:black;
    border-bottom:1px solid white;
    cursor:default;
    box-shadow: none;
 }