JavaScript實作對文本框指派的小功能

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JavaScript實作下拉菜單對文本框指派的小功能

 <script language="javaScript">

  function changeValue() {

    testForm.t1.value = testForm.s1.value;

  }

</script>

<form name="testForm" action="">

  <select name="s1" onChange="changeValue()">

    <option value="ddddd">1111</option>

    <option value="bbbbbb">2222</option>

  </select>

  <input type="text" name="t1">

</form>