<select id="terminauswahl">
        <option></option>
        <option></option>
        <option></option>
        <option></option>
        <option></option>
    </select>
    <script>
        function myParseDate(rows, rowIdx) {
            var datearr = rows[rowIdx].cells[1].innerHTML.split(".");
            var timearr = rows[rowIdx].cells[2].innerHTML.split(":");
            return new Date(parseInt(datearr[2]), parseInt(datearr[1]) - 1, parseInt(datearr[0]),
                            parseInt(timearr[1]), parseInt(timearr[0]), 0);
        }
        var now = new Date().getTime();
        var rows = document.getElementById("termine").rows;
        var nextTime = new Date(2099, 0, 1).getTime();
        var rowIdx = 1;
        for (var i = 1; i < rows.length; i++) {
            var currentTime = myParseDate(rows, i).getTime();
            if (currentTime < nextTime && currentTime > now) {
                rowIdx = i;
                nextTime = currentTime;
            }
        }
        console.log(rowIdx);
        rows[rowIdx].style.backgroundColor = "lightblue";
        rows[rowIdx].style.border = "thin solid blue";
        document.getElementById("sThema").innerHTML = rows[rowIdx].cells[0].innerHTML;
        document.getElementById("sDatum").innerHTML = rows[rowIdx].cells[1].innerHTML;
        document.getElementById("sUhrzeit").innerHTML = rows[rowIdx].cells[2].innerHTML;
        document.getElementById("sOrt").innerHTML = rows[rowIdx].cells[3].innerHTML;
        var terminauswahl = document.getElementById("terminauswahl");
        for (var i = 0; i < rows.length; i++) {
            var time = rows[i].cells[1].innerHTML + " " + rows[i].cells[2].innerHTML;
            terminauswahl.options[i].value = time;
            terminauswahl.options[i].innerHTML = time;
        }