JavaScript实现仿Discuz风格文本框弹出层交互

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>文本框弹出内容框并取值</title>
<Script language="javascript" type="text/javascript">
function moveselect(obj,target,all){
 if (!all) all=0
 if (obj!="[object]") obj=eval("document.all."+obj)
 target=eval("document.all."+target)
 if (all==0)
 {
 while (obj.selectedIndex>-1){
 mot=obj.options[obj.selectedIndex].text
 mov=obj.options[obj.selectedIndex].value
 obj.remove(obj.selectedIndex)
 var newoption=document.createElement("OPTION");
 newoption.text=mot
 newoption.value=mov
 target.add(newoption)
 }
 }
 else
 {
 for (i=0;i<obj.length;i++)
 {
 mot=obj.options[i].text
 mov=obj.options[i].value
 var newoption=document.createElement("OPTION");
 newoption.text=mot
 newoption.value=mov
 target.add(newoption)
 }
obj.options.length=0
 }
}
function dakai(){
document.getElementById('light').style.display='block';
document.getElementById('fade').style.display='block'
}
function guanbi(){
var yuanGong=document.getElementById("yuanGong")
yuanGong.value=""//如果不加这句，则每次选择的结果追加
var huoQu=document.getElementById("D2")
for(var k=0;k<huoQu.length;k++)
yuanGong.value=yuanGong.value + huoQu.options[k].value + " "//这里的" "中间为空格，为字符间的分隔符，你可以改成别的
document.getElementById('light').style.display='none';
document.getElementById('fade').style.display='none' 
}
</script>
<style>
.black_overlay{display: none;position: absolute;top: 0%;left: 0%;width: 100%;height: 100%;background-color:#FFFFFF;z-index:1001;-moz-opacity: 0.8;opacity:.80;filter: alpha(opacity=80);}
.white_content {display: none;position: absolute;top: 25%;left: 25%;width: 50%;height: 50%;padding: 16px;border: 16px solid orange; margin:-32px; background-color: white;z-index:1002;overflow: auto;}
</style>
</head>
<body>
<input type="text" id="yuanGong" onclick="dakai()" size="50">
<div id="light" class="white_content">
<table border="1" width="350" id="table4" bordercolor="#CCCCCC" bordercolordark="#CCCCCC" bordercolorlight="#FFFFFF" cellpadding="3" cellspacing="0">
  <tr>
  <td width="150" height="200" align="center" valign="middle">
   该部门员工
   <select size="12" name="D1" ondblclick="moveselect(this,'D2')" multiple="multiple" style="width:140px">
   <option value="员工1">员工1</option>
   <option value="员工2">员工2</option>
   <option value="员工3">员工3</option>
   </select>
  </td>
  <td width="50" height="200" align="center" valign="middle">
  <input type="button" value="<<" name="B3" onclick="moveselect('D2','D1',1)" /><br />
  <input type="button" value="<" name="B5" onclick="moveselect('D2','D1')" /><br />
  <input type="button" value=">" name="B6" onclick="moveselect('D1','D2')" /><br />
  <input type="button" value=">>" name="B4" onclick="moveselect('D1','D2',1)" /><br />
  </td>
  <td width="150" height="200" align="center" valign="middle">
  未划分部门员工
   <select size="12" name="D2" id="D2" ondblclick="moveselect(this,'D1')" multiple="multiple" style="width:140px">
   <option value="员工4">员工4</option>
   <option value="员工5">员工5</option>
   </select>
  </td>
  </tr>
</table>
<a href = "javascript:void(0)" onclick = "guanbi()">确定</a><BR><BR>
</div>
<div id="fade" class="black_overlay"></div>
</body>
</html>