选择组合框值时自动填充文本字段

Question

我想问一下JavaScript onchange函数和PHP。

我有从db（MySql）获得的值的组合框，这是我的进步：

这是我的数据库内容：

member:
  person_name (person one, person two, person three)
  description ("sdsdsdsds","ewewewewe","gfdfdfdff","dfdfdfdfdfS")

PHP：

  include "conn.php";

  $query = "SELECT person_name FROM member";
  $result = mysql_query($query);
  echo "<select name='name'>";
  echo "<option value=''>-Select-</option>";
  while($row = mysql_fetch_array($result)) {
      echo "<option value='".$row['person_name']."'>".$row['person_name']."</option>";
  }
  echo "</select>";

所以，当我选择其中一个值时，我想要空白的textarea，

<textarea>"FILLED WITH DESCRIPTION FROM DB BASED ON NAME SELECTED</textarea>

Answer 1

我认为你正在寻找这个 -

 echo "<select name='name' id='sel_id' onchange='fillData()'>";
  echo "<option value=''>-Select-</option>";
  while($row = mysql_fetch_array($result)) {
      echo "<option value='".$row['person_name']."'>".$row['person_name']."</option>";
  }
  echo "</select>";

  echo "<textarea id='txt_id'></textarea>";

function fillData(){
    var s = document.getElementById("sel_id");
    var val = s.options[s.selectedIndex].text;
    document.getElementById("txt_id").innerHTML = val;
}

请注意：我还没有测试过。