代码改变世界

muselect

2008-09-19 11:17  zhangbaoyu  阅读(447)  评论(0)  编辑  收藏  举报
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>m</TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<META NAME="Description" CONTENT="Power by 51windows.Net">
</HEAD>
<BODY>
<form method="post" name="myform">
  <table border="1" width="400">
    <tr>
      <td><CENTER>
          item left
        </CENTER></td>
      <td></td>
      <td><CENTER>
          item right
        </CENTER></td>
    </tr>
    <tr>
      <td width="40%"><select style="width:100%;" multiple name="left" size="8"
  ondblclick="moveOption(document.getElementById('left'), document.getElementById('right'))">
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
          <option value="4">4</option>
          <option value="5">5</option>
          <option value="6">6</option>
        </select>
      </td>
      <td width="20%" align="center"><input type="button" value=" >>>> " onClick="moveOption(document.getElementById('left'), document.getElementById('right'))">
        <br>
        <br>
        <input type="button" value=" <<<< " onClick="moveOption(document.getElementById('right'), document.getElementById('left'))">
      </td>
      <td width="40%"><select style="width:100%;" multiple name="right" size="8"
  ondblclick="moveOption(document.getElementById('right'), document.getElementById('left'))">
        </select>
      </td>
    </tr>
    <tr>
      <td colspan="3"><CENTER>
          <INPUT TYPE="button" value="up" onClick="changepos(right,-1)">
          <INPUT TYPE="button" value="down" onClick="changepos(right,1)">
          <INPUT TYPE="button" value="top" onClick="gototop(right)">
        </CENTER></td>
    </tr>
  </table>
 
  <input type="text" name="result" id="result" size="40" value="" />
</form>
<script language="JavaScript">
<!--
function moveOption(e1, e2){
 for(var i=0;i<e1.options.length;i++){
  if(e1.options[i].selected){
   var e = e1.options[i];
   e2.options.add(new Option(e.text, e.value));
   e1.remove(i);
   i=i-1
  }
 }
 document.getElementById('result').value=getvalue(document.getElementById('right'));
}
function getvalue(geto){
 //var allvalue = "";
 //for(var i=0;i<geto.options.length;i++){
 // allvalue +=geto.options[i].value + ",";
 //}
 var resultArray = new Array();
 for(var i=0;i<geto.options.length;i++){
  resultArray.push(geto.options[i].value);
 }
 return resultArray.join();
}
function changepos(obj,index){
 if(index==-1){
  if(obj.selectedIndex !=-1){
   if (obj.selectedIndex>0){
    obj.options(obj.selectedIndex).swapNode(obj.options(obj.selectedIndex-1));
    document.getElementById('result').value=getvalue(document.getElementById('right'));
   }
  }else{
   alert("please select a item");
  }
 }else if(index==1){
  if(obj.selectedIndex !=-1){
   if (obj.selectedIndex<obj.options.length-1) {
    obj.options(obj.selectedIndex).swapNode(obj.options(obj.selectedIndex+1));
    document.getElementById('result').value=getvalue(document.getElementById('right'));
   }
  }else{
   alert("please select a item");
  }
 }
}
function gototop(obj){
 if(obj.multiple){
  if(obj.selectedIndex !=-1){
   for(var selIndex=0; selIndex<obj.options.length; selIndex++){
    if(obj.options[selIndex].selected){
                     var transferIndex = selIndex;
                     while(transferIndex > 0 && !obj.options[transferIndex - 1].selected){
                         obj.options[transferIndex].swapNode(obj.options[transferIndex - 1]);
                         transferIndex --;
                     }
      document.getElementById('result').value=getvalue(document.getElementById('right'));
                 }
   }
  }else{
   alert("please select a item");
  }
 }else{
  if(obj.selectedIndex !=-1){
   var selIndex = obj.selectedIndex;
   while(selIndex > 0){
    obj.options[selIndex].swapNode(obj.options[selIndex - 1]);
    selIndex --;
   }
   document.getElementById('result').value=getvalue(document.getElementById('right'));
  }else{
   alert("please select a item");
  }
 }
}
//-->
</script>
</BODY>
</HTML>