在留言的页面我想用一个下拉表来选择头像，并在选择时，头像在下拉表的右方显示

<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>