<SCRIPT language="javascript">
function moveSelected(oSourceSel,oTargetSel)
{
//建立存储value和text的缓存数组
var arrSelValue = new Array();
var arrSelText = new Array();
//此数组存贮选中的options，以value来对应
var arrValueTextRelation = new Array();
var index = 0;//用来辅助建立缓存数组

//存储源列表框中所有的数据到缓存中，并建立value和选中option的对应关系
for(var i=0; i<oSourceSel.options.length; i++)
{
if(oSourceSel.options[i].selected)
{
//存储
arrSelValue[index] = oSourceSel.options[i].value;
arrSelText[index] = oSourceSel.options[i].text;
//建立value和选中option的对应关系
arrValueTextRelation[arrSelValue[index]] = oSourceSel.options[i];
index ++;
}
}

//增加缓存的数据到目的列表框中，并删除源列表框中的对应项
for(var i=0; i<arrSelText.length; i++)
{
//增加
var oOption = document.createElement("option");
oOption.text = arrSelText[i];
oOption.value = arrSelValue[i];
oTargetSel.add(oOption);
//删除源列表框中的对应项
oSourceSel.removeChild(arrValueTextRelation[arrSelValue[i]]);
}
}

//js文件完毕
</SCRIPT>

<FORM name="form1" method="post" action="addshow.asp?action=add">
<SELECT name="left" size="10" id="select" multiple style="width:100px; ">
<OPTION value="aaaaa">aaaaa</OPTION>
<OPTION value="bbbbb">bbbbb</OPTION>
<OPTION value="ccccc">ccccc</OPTION>
<OPTION value="ddddd">ddddd</OPTION>
<OPTION value="eeeee">eeeee</OPTION>
<OPTION value="fffff">fffff</OPTION>
<OPTION value="ggggg">ggggg</OPTION>
</SELECT>
<INPUT style="border:1px solid black " type="button" value=">>>" onClick="moveSelected(document.all.left,document.all.right)">
<INPUT style="border:1px solid black " type="button" value="<<<" onClick="moveSelected(document.all.right,document.all.left)">
<SELECT name="right" size="10" id="select" multiple style="width:100px; ">
</SELECT>
<br>
<br><input type="submit" name="Submit" value="提交">
</FORM>

<% dim action
action=trim(request("Action"))
select case action
case "add"
lefts=request.form("left")
rights=request.form("right")
end select
%>
<%=lefts%><br>
<%=rights%>