一个下拉列表框到另一个下拉列表框

最新推荐文章于 2021-06-04 21:43:55 发布
转载最新推荐文章于 2021-06-04 21:43:55 发布 · 790 阅读
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本文提供了一个HTML页面示例，展示了如何使用JavaScript操作两个选择器组件，实现选项的添加、删除及排序等功能，适用于前端开发人员学习和参考。
<html>
<head>
<META content="text/html; charset=gb2312" http-equiv=Content-Type>
<link rel="stylesheet" href="common.css">
</head>
<body bgColor=skyblue>
<form action="select.htm" method="post" name="myform">
<br><br><br>
<div align="center"><center><left>    
<table style="FONT-SIZE: smaller">
  <tr><td>
   <table>
   <tr><td>
   <select name="left_select" style="HEIGHT: 200px; WIDTH: 100px" multiple>
           <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><OPTION VALUE="H">H</OPTION>
           <OPTION VALUE="I">I</OPTION><OPTION VALUE="J">J</OPTION>
           <OPTION VALUE="K">K</OPTION><OPTION VALUE="L">L</OPTION>
           <OPTION VALUE="M">M</OPTION><OPTION VALUE="N">N</OPTION>
           <OPTION VALUE="O">O</OPTION><OPTION VALUE="P">P</OPTION>
   </select>
   </td></tr>
   </table>
   </td><td>
   <table border="0">
   
   <br>
   <tr><td>
   <INPUT language="javascript" name="btn_select_addany" onclick="fun_select_addany(document.myform)" style="COLOR: blue; FONT-FAMILY: Webdings; FONT-SIZE: 12pt; FONT-WEIGHT: normal; HEIGHT: 28px; WIDTH: 27px" title="Add any" type=button value="8"></td></tr><tr><td>
   <INPUT language="javascript" name="btn_select_addall" onclick="fun_select_addall(document.myform)" style="COLOR: blue; FONT-FAMILY: Webdings; FONT-SIZE: 12pt; FONT-WEIGHT: normal; HEIGHT: 28px; WIDTH: 27px" title="Add all" type=button value=: DESIGNTIMESP="17713"></td></tr><tr><td>
   <br><br></td></tr><tr><td>
   <INPUT language="javascript" name="btn_select_dltany" onclick="fun_select_dltany(document.myform)" style="COLOR: blue; FONT-FAMILY: Webdings; FONT-SIZE: 12pt; FONT-WEIGHT: normal; HEIGHT: 28px; WIDTH: 27px" title ="delete any" type=button value="7"></td></tr><tr><td>
   <INPUT language="javascript" name="btn_select_dltall" onclick="fun_select_dltall(document.myform)" style="COLOR: blue; FONT-FAMILY: Webdings; FONT-SIZE: 12pt; FONT-WEIGHT: normal; HEIGHT: 28px; WIDTH: 27px" title ="delete all" type=button value="9"></td></tr>
   <tr><td></td></tr>
   <tr><td>
   </td></tr>
   </table></TD><td>   
   <table style="FONT-SIZE: smaller">
   <tr><td>
   <select name="right_select" style="HEIGHT: 200px; WIDTH: 100px" multiple>
   </select>
   </td></tr>
   </table>
   </td></TR></TBODY></TABLE></div></CENTER>
</form>   
</body>
</html>
          
<script language="javascript">
function fun_select_addany(theform){
    var i; 
    for (i=0;i<theform.left_select.length;i++){
        if (theform.left_select.options[i].selected == true){
           theform.right_select.options[theform.right_select.length]=new Option(theform.left_select.options[i].text);
           theform.left_select.options.remove(i);
           i--;
        } 
    }
    sort_select(document.myform);
} 
function fun_select_addall(theform){
    var i;   
    for (i=0;i<theform.left_select.length;i++){
        theform.right_select.options[theform.right_select.length]=new Option(theform.left_select.options[i].text);    
    }
    theform.left_select.length=0;     
    sort_select(document.myform); 
}  
function fun_select_dltany(theform){
   var i; 
   for (i=0;i<theform.right_select.length;i++){
       if (theform.right_select.options[i].selected == true){
          theform.left_select.options[theform.left_select.length]=new Option(theform.right_select.options[i].text);
          theform.right_select.options[i] =new Option("");
          theform.right_select.options.remove(i);
          i--;
       } 
   }
   sort_select(document.myform);
}
function fun_select_dltall(theform){
    var i;   
    for (i=0;i<theform.right_select.length;i++){
        theform.left_select.options[theform.left_select.length]=new Option(theform.right_select.options[i].text);
    }
    theform.right_select.length=0;            
    sort_select(document.myform);
}
function sort_select(theform){
    var i; 
    var left_array= new Array();
    var right_array = new Array();                    
    for (i=0;i<theform.left_select.length;i++){
        left_array[i] = new Array(theform.left_select.options[i].text);
    }
    for (i=0;i<theform.right_select.length;i++){
        right_array[i] = new Array(theform.right_select.options[i].text);
    }
left_array.sort();
    right_array.sort();
    theform.left_select.length=0;
    theform.right_select.length=0;            
    
    for (i=0;i<left_array.length;i++){
        theform.left_select.options[theform.left_select.length]=new Option(left_array[i]);
    }
    for (i=0;i<right_array.length;i++){
        theform.right_select.options[theform.right_select.length]=new Option(right_array[i]);
    }
    left_array= new Array();
    right_array = new Array();      
}   
</script>