更改文本框值时，是否使用JavaScript在下拉列表中选择一个值？

我在HTML页面中使用下面给定的代码来更改下拉列表的值，该值必须小于或等于文本框中输入的值

Javascript-

function abc(){
                var dp = document.getElementById("oildate1");
                document.getElementById("ocb3").text = dp;
                }

HTML和PHP代码

<input type="text" name="oildate1" id="oildate1" onChange="abc()">
                    <select name="ocb3" id="ocb3">
                            <?php 
                                include 'connection.php';
                                $sql = mysqli_query($con,"select Sno,dateoil, replace(dateoil,'-','') as trimmed_date from dieselrates WHERE Transname='$Transname' order by dateoil ASC");
                                while ($row = mysqli_fetch_array($sql)){
                                echo "<option value=$row[Sno]>$row[trimmed_date]</option>";
                                }
                            ?>
                    </select>