.mySelect_panel {
    position: relative;
}
.mySelect_items {
    position:absolute;
   
    box-shadow: rgba(0, 0, 0, 0.16) 0px 1px 4px;
    background-color: white;
    border-radius: 0px 0px 20px 20px;
    color: black;
    max-height: 100px;
    overflow: auto;

    max-height: 0;
    overflow: auto;
    margin:auto;
    width:100%;
    z-index:1000;

}



.mySelect_panel.active .mySelect_items {
    max-height: 300px;
}