js省市联动

<script>
    var arr = new Array;
    arr[0] = [ new Option("--请选择市--", "-1") ];
    arr[1] = [ new Option("烟台", "6"), new Option("青岛", "2"),
            new Option("济南", "1") ];
    arr[2] = [ new Option("长沙", "1"), new Option("岳阳", "6") ];
    function change(index) {
        $(‘city‘).innerHTML = ‘‘;
        for (i = 0; i < arr[index].length; i++) {
            $(‘city‘).options[i] = arr[index][i];
        }
    }
</script>

<tr>
                            <td>所在地区:</td>
                            <td>
                            <select name="province" style="width:120px;"
                                onchange="change(this.selectedIndex);">
                                    <option value="-1">--请选择省--</option>
                                    <option value="37">山东</option>
                                    <option value="43">湖南</option>
                            </select> 
                            <select id="city" name="city" style="width:120px;">
                                    <option value="-1">--请选择市--</option>
                            </select>
                            </td>
</tr>