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The ListBox implements a simple example of moving up, down, moving left, and moving right

Source: Internet
Author: User
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  This article mainly introduces a simple example of how to move up, down, move left, and move right in the listbox implementation. Need friends can come to the reference, I hope to help you.

    Code as follows: <html> <head>     <title>javascript version select Pull-down menu to move and sort </title>   & nbsp <meta http-equiv= "Content-type" content= "text/html; charset=gb2312 > </head> <body>     <p> Select one or more items and then click Add or Remove (hold down SHIFT or CTRL to select more). or double-click on the selection to add and remove. </p>     <form method= "POST" name= "MyForm" >     <table border= "0" width= "" > &nbs P       <tr>             <TD width= "40%" >       &NBS P         <select style= "width:100px; height:200px "Multiple name=" List1 "size=" "ondblclick=" Moveoption (Document.myform.list1, Document.myform.list2) " >                     <option value= "Beijing" > Beijing </option> &nbs P                   <option value= "Shanghai" > Shanghai </option>     &N Bsp       &NBSP       <option value= "Shandong" > Shandong </option>                 &N Bsp   <option value= "Anhui" > Anhui </option>                     &L T;option value= "Chongqing" > Chongqing </option>                     <option Value= "Fujian" > Fujian </option>                     <option value= "Gansu "> Gansu </option>                     <option value=" Guangdong "> Guangdong &L t;/option>                     <option value= "Guangxi" > Guangxi </option >                     <option value= "Guizhou" > Guizhou </option> &nbs P                   <option value= "Hainan" > Hainan </option>     &N Bsp   &nbsp           <option value= "Hebei" > Hebei </option>             &N Bsp       <option value= "Heilongjiang" > Heilongjiang </option>                     <option value= "Henan" > Henan </option>                   &N Bsp <option value= "Hubei" > Hubei </option>                     <optio n value= "Hunan" > Hunan </option>                     <option value= " Inner Mongolia "> Inner Mongolia </option>                     <option value=" Jiangsu "> Jiangsu </option>                     <option value= "Jiangxi" > Jiangxi </op tion>                     <option value= "Jilin" > Jilin </option>   &nbsp                 <option value= "Liaoning" > Liaoning </option>       &N Bsp             <option value= "Ningxia" > Ningxia </option>           &N Bsp         <option value= "Qinghai" > Qinghai </option>               &N Bsp     <option value= "Shanxi" > Shanxi </option>                   &N Bsp <option value= "Shaanxi" > Shaanxi </option>                     <optio n value= "Sichuan" > Sichuan </option>                     <option value= " Tianjin "> Tianjin </option>                     <option value=" Tibet "> Tibet </option>                     <option value= "Xinjiang" > Xinjiang </option>                     <option value= "Yunnan" > Yunnan </option>                     <option value= "Zhejiang" > Zhejiang </option>   &N Bsp                 <option value= "Hong Kong" > Hong Kong </option>       &N Bsp             <option value= "Macau" > Macau </option>           &N Bsp         <option value= "Taiwan" > Taiwan </option>               &N Bsp     <option value= "Other" > Other </option>                 </sele ct>             </td>             <TD width= "20%" align= "center" >                 <input type= "button" value= ">>" onclic K= "MOveoption (Document.myform.list1, document.myform.list2) "><br/>                 <br/>                 <input type= "button" value= "<< "Onclick=" Moveoption (Document.myform.list2, Document.myform.list1) ">             < /TD>             <TD width= "40%" >                 <select style= "width:100px; height:200px "Multiple name=" List2 "size=" "ondblclick=" Moveoption (Document.myform.list2, Document.myform.list1) " >                 </select>             ;/td>             <td>                 < Button onclick= "Changepos (list2,-1)" type= "button" >                   &NBS P∧</button>                 <br/>           & nbsp     <button onclick= "Changepos (list2,1)" type= "button" >               & nbsp    ∨</button>             </td>         </TR&G T     </table>     value: <input type= "text" name= "City" size= "" ">     </form> nbsp   <script language= "JavaScript" >      <!--        function moveoption (E 1, E2) {            try {                for (var i = 0; i < e1.options.length; i++) {                    if (e1.options[i].selected) {    & nbsp                   var e = e1.options[i]; &nbsp                       E2.options.add (new Option (E.text, E.value));                         e1.remove (i);                         i = i-1                                                     Document.myform.city.value = GetValue (DOCUMENT.MYFORM.LIST2);                         catch (e) {}       & nbsp }           function GetValue (geto) {            var allvalue = "" ;             for (var i = 0; i < geto.options.length i++) {        & nbsp       Allvalue + + Geto.options[i].valUE + ",";                         return allvalue;        }           function changepos (obj, index) {      &NB Sp     if (index = 1) {                if (Obj.selectedindex > 0) {& nbsp                   obj.options (obj.selectedindex) SwapNode (Obj.options ( obj.selectedindex-1)                 {          &NBSP ; }             ELSE if (index = 1) {                if (Obj.selectedindex < obj.options.length-1) {                  &NBSP ; Obj.options (Obj.selectedindex). SwapNode (Obj.options (Obj.selectedindex + 1))             & nbsp  }           }        }     //-->      </SCRIPT&G T </body> </html>  

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