HTML

<table>
<tr>
<td valign=top>
<select name=s1 multiple size=4 style="width:100">
<option value=8>趙本山
<option value=9>劉德華
<option value=10>張惠妹
<option value=11>孫悟空
<option value=12>豬八戒
<option value=13>哈哈
<option value=14>親愛的我愛你。
<option value=15>老婆我愛你
</select>
</td>
<td valign=middle align=center>
<input type=button name=b4 value=">" onClick="move(1)"><br>
<input type=button name=b5 value="<" onClick="move(2)">
</td>
<td valign=top>
<select name=s2 multiple size=4 style="width:100">
</select>
</td>
</tr>
<tr>
<td>
<input type=button name=b1 value="向上移動" onClick="up()">
<input type=button name=b2 value="向下移動" onClick="down()">
</td>
<td>
<input type=button name=b3 value="顯示" onClick="show()">
</td>
<td>
</td>
</tr>
</table>
 
<script> 
function up() {
s = document.all.s1;
v = new Array();
for(i=0;i<s.length-1;i++) {
    if(! s.options[i].selected && s.options[i+1].selected) {
      v.value = s.options[i].value;
      v.text = s.options[i].text;
      v.selected = s.options[i].selected;
      s.options[i].value = s.options[i+1].value;
      s.options[i].text = s.options[i+1].text;
      s.options[i].selected = s.options[i+1].selected;
      s.options[i+1].value = v.value;
      s.options[i+1].text = v.text;
      s.options[i+1].selected = v.selected;
    }
}
}
 
function down() {
s = document.all.s1;
v = new Array();
for(i=s.length-1;i>0;i--) {
    if(! s.options[i].selected && s.options[i-1].selected) {
      v.value = s.options[i].value;
      v.text = s.options[i].text;
      v.selected = s.options[i].selected;
      s.options[i].value = s.options[i-1].value;
      s.options[i].text = s.options[i-1].text;
      s.options[i].selected = s.options[i-1].selected;
      s.options[i-1].value = v.value;
      s.options[i-1].text = v.text;
      s.options[i-1].selected = v.selected;
    }
}
}
 
function show() {
s = document.all.s1;
v = "";
for(i=0;i<s.length;i++)
    v += s.options[i].value + ":" + s.options[i].text + "\n";
alert(v);
}
 
function move(m) {
if(m == 1) {
    ss1 = document.all.s1;
    ss2 = document.all.s2;
}
if(m == 2) {
    ss1 = document.all.s2;
    ss2 = document.all.s1;
}
v = new Array();
k = 0;
for(i=0;i<ss1.length;i++) {
    if(ss1.options[i].selected) {
      ss2.options[ss2.length] = new Option(ss1.options[i].text,ss1.options[i].value);
      v[k] = i;
      k++;
    }
}
for(i=v.length-1;i>=0;i--)
    ss1.options[v[i]] = null;
}
</script>