ListBox的部分功能

<SCRIPT language="javascript">
 /***************************************************************************************************************
  * 文 件 名:selectListTools.js 
  * 文件描述:关于list列表框的一些工具方法
  *
  * 主要方法:
  *          1, moveUp(oSelect,isToTop) ------------ 向上移动一个list列表框的选中项目,
  *                                                                可以支持多选移动,可以设置是否移动到顶层
  *          2, moveDown(oSelect,isToBottom)---------- 向下移动一个list列表框的选中项目,
  *                                                                可以支持多选移动,可以设置是否移动到底层
  *          3, moveSelected(oSourceSel,oTargetSel) ------ 在两个列表框之间转移数据
  *          4, moveAll(oSourceSel,oTargetSel)--------- 转移两个列表框之间的全部数据
  *          5, deleteSelectItem(oSelect) ----------- 删除所选的项目
  *
  ****************************************************************************************************************/
/**
  * added by LxcJie 2004.6.23
  * 使选中的项目上移
  *
  * oSelect: 源列表框
  * isToTop: 是否移至选择项到顶端,其它依次下移,
  *          true为移动到顶端,false反之,默认为false
  */
 function moveUp(oSelect,isToTop)
 {
     //默认状态不是移动到顶端
     if(isToTop == null)
         var isToTop = false;
        
     //如果是多选------------------------------------------------------------------
     if(oSelect.multiple)
     {
         for(var selIndex=0; selIndex<oSelect.options.length; selIndex++)
         {
             //如果设置了移动到顶端标志
             if(isToTop)
             {
                 if(oSelect.options[selIndex].selected)
                 {
                     var transferIndex = selIndex;
                     while(transferIndex > 0 && !oSelect.options[transferIndex - 1].selected)
                     {
                         oSelect.options[transferIndex].swapNode(oSelect.options[transferIndex - 1]);
                         transferIndex --;
                     }
                 }
             }
             //没有设置移动到顶端标志
             else
             {
                 if(oSelect.options[selIndex].selected)
                 {
                     if(selIndex > 0)
                     {
                         if(!oSelect.options[selIndex - 1].selected)
                             oSelect.options[selIndex].swapNode(oSelect.options[selIndex - 1]);
                     }
                 }
             }
         }
     }
     //如果是单选--------------------------------------------------------------------
     else
     {
         var selIndex = oSelect.selectedIndex;
         if(selIndex <= 0)
             return;
         //如果设置了移动到顶端标志
         if(isToTop)
         {
             while(selIndex > 0)
             {
                 oSelect.options[selIndex].swapNode(oSelect.options[selIndex - 1]);
                 selIndex --;
             }
         }
         //没有设置移动到顶端标志
         else       
             oSelect.options[selIndex].swapNode(oSelect.options[selIndex - 1]);
     }
 }

/**
  * added by LxcJie 2004.6.23
  * 使选中的项目下移
  *
  * oSelect: 源列表框
  * isToTop: 是否移至选择项到底端,其它依次上移,
  *          true为移动到底端,false反之,默认为false
  */
 function moveDown(oSelect,isToBottom)
 {
     //默认状态不是移动到顶端
     if(isToBottom == null)
         var isToBottom = false;
        
     var selLength = oSelect.options.length - 1;
    
     //如果是多选------------------------------------------------------------------
     if(oSelect.multiple)
     {
         for(var selIndex=oSelect.options.length - 1; selIndex>= 0; selIndex--)
         {
             //如果设置了移动到顶端标志
             if(isToBottom)
             {
                 if(oSelect.options[selIndex].selected)
                 {
                     var transferIndex = selIndex;
                     while(transferIndex < selLength && !oSelect.options[transferIndex + 1].selected)
                     {
                         oSelect.options[transferIndex].swapNode(oSelect.options[transferIndex + 1]);
                         transferIndex ++;
                     }
                 }
             }
             //没有设置移动到顶端标志
             else
             {
                 if(oSelect.options[selIndex].selected)
                 {
                     if(selIndex < selLength)
                     {
                         if(!oSelect.options[selIndex + 1].selected)
                             oSelect.options[selIndex].swapNode(oSelect.options[selIndex + 1]);
                     }
                 }
             }
         }
     }
     //如果是单选--------------------------------------------------------------------
     else
     {
         var selIndex = oSelect.selectedIndex;
         if(selIndex >= selLength - 1)
             return;
         //如果设置了移动到顶端标志
         if(isToBottom)
         {
             while(selIndex < selLength - 1)
             {
                 oSelect.options[selIndex].swapNode(oSelect.options[selIndex + 1]);
                 selIndex ++;
             }
         }
         //没有设置移动到顶端标志
         else       
             oSelect.options[selIndex].swapNode(oSelect.options[selIndex + 1]);
     }
 }

/**
  * added by LxcJie 2004.6.23
  * 移动select的部分内容,必须存在value,此函数以value为标准进行移动
  *
  * oSourceSel: 源列表框对象
  * oTargetSel: 目的列表框对象
  */
 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]]);
     }
 }

/**
  * added by LxcJie 2004.6.23
  * 移动select的整块内容
  *
  * oSourceSel: 源列表框对象
  * oTargetSel: 目的列表框对象
  */
 function moveAll(oSourceSel,oTargetSel)
 {
     //建立存储value和text的缓存数组
     var arrSelValue = new Array();
     var arrSelText = new Array();
    
     //存储所有源列表框数据到缓存数组
     for(var i=0; i<oSourceSel.options.length; i++)
     {
         arrSelValue[i] = oSourceSel.options[i].value;
         arrSelText[i] = oSourceSel.options[i].text;
     }
    
     //将缓存数组的数据增加到目的select中
     for(var i=0; i<arrSelText.length; i++) 
     {
         var oOption = document.createElement("option");
         oOption.text = arrSelText[i];
         oOption.value = arrSelValue[i];
         oTargetSel.add(oOption);
     }
    
     //清空源列表框数据,完成移动
     oSourceSel.innerHTML = "";
 }

/**
  * added by LxcJie 2004.6.23
  * 删除选定项目
  *
  * oSelect: 源列表框对象
  */
 function deleteSelectItem(oSelect)
 {
     for(var i=0; i<oSelect.options.length; i++)
     {
         if(i>=0 && i<=oSelect.options.length-1 && oSelect.options[i].selected)
         {
             oSelect.options[i] = null;
             i --;
         }
     }
 }

//js文件完毕
 </SCRIPT>
 <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
 <BODY style="font-size:12px">
 <FORM name="form1" method="post" action="">
   <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>
   </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; ">
     <OPTION value="ddddd">ddddd</OPTION>
     <OPTION value="eeeee">eeeee</OPTION>
     <OPTION value="fffff">fffff</OPTION>
     <OPTION value="ggggg">ggggg</OPTION>
     <OPTION value="hhhhh">hhhhh</OPTION>
     <OPTION value="iiiii">iiiii</OPTION>
   </SELECT>
   <br><br><br><br>
   <DIV style="background-color:#CCCCCC;padding:2px">
   <INPUT style="border:1px solid black " type="button" value="上移一格" onClick="moveUp(document.all.right);moveUp(document.all.left)">
   <INPUT style="border:1px solid black " type="button" value="下移一格" onClick="moveDown(document.all.right);moveDown(document.all.left)">
   <INPUT style="border:1px solid black " type="button" value="上移到顶"
 onClick="moveUp(document.all.right,true);moveUp(document.all.left,true)">
   <INPUT style="border:1px solid black " type="button" value="下移到顶"
 onClick="moveDown(document.all.right,true);moveDown(document.all.left,true);">  (支持多选移动)
   </DIV>
   <BR><BR>
   <DIV style="background-color:#CCCCCC; padding:5px; width:100%; position:relative">
   右移:<INPUT type="radio" name="ifAll" value="right" checked> <br>
   左移:<INPUT type="radio" name="ifAll" value="left"><br><br>
   <INPUT type="button" value="移动全部" style="border:1px solid black " onClick="judgeMove()">
   </DIV>
   <br><br>
   <DIV style="background-color:#CCCCCC; padding:5px">
       <INPUT type="button" value=" 删 除 " style="border:1px solid black "
 onClick="deleteSelectItem(document.all.left);deleteSelectItem(document.all.right)">
   </div>
 </FORM>
 </BODY>
 <SCRIPT language="javascript">
 function judgeMove()
 {
     var arrRadio = document.all.ifAll;
     var valOfRadio;
     for(var i=0; i<arrRadio.length; i++)
     {
         if(arrRadio[i].checked)
         {
             valOfRadio = arrRadio[i].value;
             break;
         }
     }
     if(valOfRadio == "left")
         moveAll(document.all.right,document.all.left);
     if(valOfRadio == "right")
         moveAll(document.all.left,document.all.right);
 }
 </SCRIPT>

posted on 2008-02-26 18:31  秋天  阅读(214)  评论(0编辑  收藏  举报

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