dropdown.css

.swhDropBtn {
    /*background-color: #4CAF50;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;*/
    cursor: pointer;
}

.swhDropBtn:hover, .swhDropBtn:focus {
    background-color: #3e8e41;
}

.swhDropDown {
    position: relative;
    display: inline-block;
}

.swhDropContent {
    display: block;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    overflow: auto;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.swhDropContent a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.swhDropDown a:hover {
    background-color: #f1f1f1;
}

.show {display:block;}

.hide {display:none;}