兩個select多選模式的選項相互移動(示例代碼)

2019-11-20 21:16:24

字體：大中小

來源：轉載

供稿：網友

如下所示：

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文檔</title>
<script type="text/javascript">
function copyToList(from,to){

    var fromList=eval('document.forms[0].'+from);
    var toList=eval('document.forms[0].'+to);

    if(toList.options.length > 0 && toList.options[0].value == 'temp'){
            toList.options.length=0;
    }

    var sel=false;

    for(i = 0;i < fromList.options.length;i++){
        var current=fromList.options[i];
        if(current.selected){
            sel=true;
            if(current.value=='temp'){
                alert('不能選擇這個項目!');
                return;
            }
            txt=current.text;
            val=current.value;
            toList.options[toList.length]=new Option(txt,val);
            fromList.options[i]=null;
            i--;
        }
    }

    if(!sel) alert('你還沒有選擇任何項目!');
}

function allSelect(){
    var chsen=document.getElementById('chosen');
    //如果chsen列表框為0或第一個選項值為'temp'
    if(chsen.length && chsen.options[0].value=="temp")
        return;

    for(var i=0;i<chsen.length;i++){
            chsen.options[i].selected=true;
    }

//得到數據
function getdata() {
            var List = document.forms[0].RoleList;
　　　　　　　//得到一個隱藏文本框對象
            var roles = document.getElementById("TRoleList");
            roles.value = "";
            var s = "";
            if (List.length != 0) {
                for (i = 0; i < List.length; i++) {
                    s += List.options[i].value + ",";
                }
            }

            roles.value = s;
        }
}
</script>
</head>
<body>
<table border="0">
<form onSubmit="allSelect()">
<tr>
<td>
<select name="possible" size="4" MULTIPLE width="200" style="width:200px">
<option value="1">中國廣州</option>
<option value="2">中國上海</option>
<option value="3">中國北京</option>
<option value="4">中國武漢</option>
</select>
</td>
<td><a href="javascript:copyToList('possible','chosen')">添加至右方--><br>
<br>
</a><a href="javascript:copyToList('chosen','possible')"><--添加至左方</a></td>
<td>
<select name="chosen"   size="4" MULTIPLE width="200" style="width:200px;">
<option value="temp">從左邊選擇你的地區</option>
</select>
</td>
</tr>
</form>
</table>
<input type="button" value="提交" onclick="allSelect()" />yle
<input type="text" style="display:none;" id="TRoleList">
</body>
</html>