修改js代码（上移下移功能不管用）
0
悬赏园豆：40
[已解决问题]
解决于 2016-11-17 09:07
<!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> <title> new document </title> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <meta name="author" content="" /> <meta name="keywords" content="" /> <meta name="description" content="" /> <link rel="stylesheet" type="text/css" href="" /> <style type="text/css"></style> <script type="text/javascript"></script> <META NAME="Description" CONTENT="Power by hill"> </head> <body> <p>选定一项或多项然后点击添加或移除(按住shift或ctrl可以多选)，或在选择项上双击进行添加和移除。</p> <form method="post" name="myform"> <table border="0" width="300"> <tr> <td width="40%"> <select style="WIDTH:100%" multiple name="list1" size="12" ondblclick="moveOption(document.myform.list1, document.myform.list2)"> <option value="北京">北京</option> <option value="上海">上海</option> <option value="山东">山东</option> <option value="安徽">安徽</option> <option value="重庆">重庆</option> <option value="福建">福建</option> <option value="甘肃">甘肃</option> <option value="广东">广东</option> <option value="广西">广西</option> <option value="贵州">贵州</option> <option value="海南">海南</option> <option value="河北">河北</option> <option value="黑龙江">黑龙江</option> </select> </td> <td width="20%" align="center"> <input type="button" value="添加" onclick="moveOption(document.myform.list1, document.myform.list2)"> <br/> <br/> <input type="button" value="删除" onclick="moveOption(document.myform.list2, document.myform.list1)"> </td> <td width="40%"> <select style="WIDTH:100%" multiple name="list2" size="12" ondblclick="moveOption(document.myform.list2, document.myform.list1)"> </select> </td> <td> <button onclick="changepos(list2,-1)" type="button">上移</button> <br/> <button onclick="changepos(list2,1)" type="button">下移</button> </td> </tr> </table> 值：<input type="text" name="city" size="40"> </form> <script language="JavaScript"> function moveOption(e1, e2){ try{ 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); ii=i-1 } } document.myform.city.value=getvalue(document.myform.list2); } catch(e){} } function getvalue(geto){ var allvalue = ""; for(var i=0;i<geto.options.length;i++){ allvalue +=geto.options[i].value + ","; } return allvalue; } function changepos(obj,index) { if(index==-1){ if (obj.selectedIndex>0){ obj.options(obj.selectedIndex).swapNode(obj.options(obj.selectedIndex-1)) } } else if(index==1){ if (obj.selectedIndex<obj.options.length-1){ obj.options(obj.selectedIndex).swapNode(obj.options(obj.selectedIndex+1)) } } } </script> </body> </html>
最佳答案
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function changepos(obj, index) { var i = obj.selectedIndex; if(index == -1) { if(i > 0) { var op = obj.options[i]; obj.remove(i); obj.add(op, obj.options[i - 1]); } } else if(index == 1) { if(i < obj.options.length - 1) { var op = obj.options[i]; obj.remove(i); obj.add(op, obj.options[i + 1]); } } }
收获园豆：40
十分感谢
