asp如何实现动态下拉菜单赋值给文本框

asp如何实现动态下拉菜单赋值给文本框？

方式一:

<script>   
   function    oclick()   
   {   
   document.form1.a1.value=document.form1.select.value;   
   }   
   </script>   
   <form    name="form1"    method="post"    action="">   
       <select    name="select"    onChange="oclick();">   
           <option    value="1"    selected>1</option>   
           <option    value="2">2</option>   
           <option    value="3">3</option>   
       </select>   
       <input    type="text"    name="a1">   
   </form>   



方式二:

<form    name="search"    method="post"    action="abc.asp">   
     <input    name=key    id="key"    value="">   
     <select    name="type"    id="type"    onBlur="document.search.key.value=this.value;">   
         <option    value="1">歌曲</option>   
         <option    value="2">歌手</option>   
         <option    value="3">专辑</option>   
     </select>