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JQuery MultiSelect(左右选择框)

<!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=gb2312" />    <title>demo</title>    <script src="jquery-1.4.4.min.js"></script>    <script>    $(function(){        //选择一项        $("#addOne").click(function(){            $("#from option:selected").clone().appendTo("#to");            $("#from option:selected").remove();        });         //选择全部        $("#addAll").click(function(){            $("#from option").clone().appendTo("#to");            $("#from option").remove();        });         //移除一项        $("#removeOne").click(function(){            $("#to option:selected").clone().appendTo("#from");            $("#to option:selected").remove();        });         //移除全部        $("#removeAll").click(function(){            $("#to option").clone().appendTo("#from");            $("#to option").remove();        });         //移至顶部        $("#Top").click(function(){            var allOpts = $("#to option");            var selected = $("#to option:selected");             if(selected.get(0).index!=0){                for(i=0;i<selected.length;i++){                   var item = $(selected.get(i));                   var top = $(allOpts.get(0));                   item.insertBefore(top);                }            }        });         //上移一行        $("#Up").click(function(){            var selected = $("#to option:selected");            if(selected.get(0).index!=0){                selected.each(function(){                    $(this).prev().before($(this));                });            }        });         //下移一行        $("#Down").click(function(){            var allOpts = $("#to option");            var selected = $("#to option:selected");             if(selected.get(selected.length-1).index!=allOpts.length-1){                for(i=selected.length-1;i>=0;i--){                   var item = $(selected.get(i));                   item.insertAfter(item.next());                }            }        });         //移至底部        $("#Buttom").click(function(){            var allOpts = $("#to option");            var selected = $("#to option:selected");             if(selected.get(selected.length-1).index!=allOpts.length-1){                for(i=selected.length-1;i>=0;i--){                   var item = $(selected.get(i));                   var buttom = $(allOpts.get(length-1));                   item.insertAfter(buttom);                }            }        });    });    </script>  </head><body><table align="center" width="288" border="0" cellpadding="0" cellspacing="0">    <tr>        <td colspan="4">            <select name="from" id="from" multiple="multiple" size="10" style="width:100%">                <option value="1">选项1</option>                <option value="2">选项2</option>                <option value="3">选项3</option>                <option value="4">选项4</option>                <option value="5">选项5</option>                <option value="6">选项6</option>                <option value="7">选项7</option>            </select>        </td>        <td align="center">            <input type="button" id="addAll" value=" >> " style="width:50px;" /><br />            <input type="button" id="addOne" value=" > " style="width:50px;" /><br />            <input type="button" id="removeOne" value="&lt;" style="width:50px;" /><br />            <input type="button" id="removeAll" value="&lt;&lt;" style="width:50px;" /><br />        </td>        <td colspan="4">            <select name="to" id="to" multiple="multiple" size="10" style="width:100%">            </select>        </td>        <td align="center">            <input type="button" id="Top" value="置顶" style="width:50px;" /><br />            <input type="button" id="Up" value="上移" style="width:50px;" /><br />            <input type="button" id="Down" value="下移" style="width:50px;" /><br />            <input type="button" id="Buttom" value="置底" style="width:50px;" /><br />        </td>    </tr></table></body></html>

 

JQuery MultiSelect(左右选择框)