两个列表框中的元素相互移动(源代码)

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JavaScript XHTML CSS HTML C

<!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>移动</title>
<style type="text/css">
form{background:#CCCCCC;
width:500px;
}
td{width:150px;
height:150px;
text-align:center;
}
select{ width:100px;
height:180px;

}
td div{width:100px;
height:150px;
text-align:center;
}
input{width:100px;
height:30px;
margin:5px;
}
</style>
</head>

<body>
<form id="myForm" name="myForm" method="post" action="#">
<table>
<tr>
<td>
    <select name="listLeft" id="listLeft" size="10" multiple="multiple" ondblclick="removeOne(listLeftnode,listRightnode);" >
      <option value="a">a</option>
      <option value="b">b</option>
      <option value="c">c</option>
      <option value="d">d</option>
      <option value="e">e</option>
      <option value="f">f</option>
      <option value="g">g</option>
    </select> </td>
<td>
  <div>
<input type="button" name="allRightMove" id="allRightMove" value=" >> " onclick="removeAll(listLeftnode,listRightnode);"/><br />
   <input type="button" name="rightMove" id="rightMove" value=" > " onclick="removeOne(listLeftnode,listRightnode);"/><br />
   <input type="button" name="leftMove" id="leftMove" value=" < "    disabled="disabled" onclick="removeOne(listRightnode,listLeftnode);" /><br />
   <input type="button" name="allLeftMove" id="allLeftMove" value=" << " disabled="disabled" onclick="removeAll(listRightnode,listLeftnode);" />
  </div>
   </td>
<td><select name="listRight" size="10" multiple="multiple" id="listRight" ondblclick="removeOne(listRightnode,listLeftnode);">
    </select>
</td>
</tr>
</table>
<script type="text/javascript">
var listLeftnode = document.getElementById("listLeft");
var listRightnode = document.getElementById("listRight");
var btallRightMove = document.getElementById("allRightMove");
var btRightMove = document.getElementById("rightMove");
var btLeftMove = document.getElementById("leftMove");
var btallLeftMove = document.getElementById("allLeftMove");

function isEmpty()
{
  if(listLeftnode.options.length<1)
  {
   btallRightMove.setAttribute("disabled","disabled");
   btRightMove.setAttribute("disabled","disabled");
  }
  else
  {
   btallRightMove.removeAttribute("disabled");
   btRightMove.removeAttribute("disabled");
  }
  if(listRightnode.options.length<1)
  {
   btallLeftMove.setAttribute("disabled","disabled");
   btLeftMove.setAttribute("disabled","disabled");
  }
  else
  {
   btallLeftMove.removeAttribute("disabled");
   btLeftMove.removeAttribute("disabled");
  }
}

function removeOne(beginList, endList)
{
  var flag=false;
  for(i=beginList.options.length-1; i>=0; i--)
  {
   if(beginList.options[i].selected)
   {   flag=true;
    var tempOption = beginList.options[i];
    beginList.remove(i);
    endList.add(tempOption, endList.last);
   }
  }
  if(!flag)
  {
   alert("您没有选择，不能移动！！");
  }
  isEmpty();

}

function removeAll(beginList,endList)
{
  for(i=beginList.options.length-1; i>=0; i--)
  {
   var tempOption = beginList.options[i];
   beginList.remove(i);
   endList.add(tempOption, endList.first);
  }
   isEmpty();
}
</script>
</form>
</body>
</html>