javascript - Drop down list to PHP SQL DATABASE -


how can txttrackid database, 1 dropdown list

<label><b>track/section</b></label></br> <select id="soflow" name="track_type" onchange="add1()">    <option value="">select tracks</option>   <option value="abm">abm</option>   <option value="stem">stem</option>   <option va;lue="ict">ict</option>   <option value="has">has</option>   <option value="bm">bm</option>   <option value="humms">humms</option> </select>  <input id="txttrackid" class="txttrackid" name="txttrackid" type="text"> </br>

and here javascript code

   <script>       function add1() {        var ddlvalue = document.getelementbyid("soflow").value;       var up1 = document.getelementbyid("txttrackid");       //console.log(ddlvalue);       if (ddlvalue == 'abm')         up1.value = '1';       else if (ddlvalue == 'stem')         up1.value = '2';       else if (ddlvalue == 'ict')         up1.value = '3';       else if (ddlvalue == 'has')         up1.value = '4';       else if (ddlvalue == 'bm')         up1.value = '5';       else if (ddlvalue == 'humms')         up1.value = '6';      }      </script>

only 1 dropdown list shows when enter in database

i rewrote code, easier getting setting values on select use when need them

         function add1() {         var selval=$("#soflow").val();//get value of select box on select        if(selval !=""){//if value not empty         $("#txttrackid").val(selval);//set value in txttrackid        }                }     
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <label><b>track/section</b></label></br>  <select id="soflow" name="track_type" onchange="add1()">      <option value="">select tracks</option>    <option value="1">abm</option>    <option value="2">stem</option>    <option value="3">ict</option>    <option value="4">has</option>    <option value="5">bm</option>    <option value="6">humms</option>  </select>  <input id="txttrackid" class="txttrackid" name="txttrackid" type="text"> </br>


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