在留言的頁面我想用一個下拉表來選擇頭像，並在選擇時，頭像在下拉表的右方顯示

<script>
function xingzhe(pram)
{
    avatar.src=pram

}
</script>

<select name=selectbox οnchange="xingzhe(this.options[this.selectedIndex].value)">

<option value="http://img.mop.com/images/face/011.gif">= 1 =
<option value="http://img.mop.com/images/face/023.gif">= 2 =
<option value="http://img.mop.com/images/face/050.gif">= 3 =
</select>
<img src="http://img.mop.com/images/face/011.gif" name=avatar>