function AddDistrict(NewDistrict){
// remove existing list
   for (var i= objSelect.length; i > 0 ; i--){
       objSelect.remove(i);
    }
    for (var i=0; i < NewDistrict.length;i++) {
             objSelect.options.add(document.createElement('OPTION'));
           objSelect.options[i+1].text = NewDistrict[i];
         objSelect.options[i+1].value = NewDistrict[i];
    }
}
function AllDistrict() {
var AD = new Array();
AD[0] = '香港仔';
AD[1] = '銅鑼灣';
AD[2] = '中環';
AD[3] = '柴灣';
AD[4] = '長沙灣';
AD[5] = '鑽石山';
AD[6] = '粉嶺';
AD[7] = '跑馬地';
AD[8] = '何文田';
AD[9] = '紅磡';
AD[10] = '離島';
AD[11] = '堅尼地城';
AD[12] = '九龍灣';
AD[13] = '九龍城';
AD[14] = '九龍塘';
AD[15] = '葵涌';
AD[16] = '觀塘';
AD[17] = '荔枝角';
AD[18] = '藍田';
AD[19] = '馬鞍山';
AD[20] = '半山';
AD[21] = '中半山';
AD[22] = '東半山';
AD[23] = '西半山';
AD[24] = '旺角';
AD[25] = '牛池灣';
AD[26] = '牛頭角';
AD[27] = '北角';
AD[28] = '北角半山';
AD[29] = '山頂';
AD[30] = '薄扶林';
AD[31] = '側魚涌';
AD[32] = '淺水灣';
AD[33] = '西貢';
AD[34] = '西營盤';
AD[35] = '新蒲崗';
AD[36] = '深水埗';
AD[37] = '沙田';
AD[38] = '筲箕灣';
AD[39] = '石硤尾';
AD[40] = '上水';
AD[41] = '上環';
AD[42] = '壽臣山';
AD[43] = '小西灣';
AD[44] = '赤柱';
AD[45] = '大角咀';
AD[46] = '大埔';
AD[47] = '大潭';
AD[48] = '土瓜灣';
AD[49] = '將軍澳';
AD[50] = '尖沙咀';
AD[51] = '青衣';
AD[52] = '荃灣';
AD[53] = '屯門';
AD[54] = '東涌';
AD[55] = '灣仔';
AD[56] = '橫頭磡';
AD[57] = '香港西區';
AD[58] = '黃竹坑';
AD[59] = '黃大仙';
AD[60] = '油麻地';
AD[61] = '油塘';
AD[62] = '又一村';
AD[63] = '元朗';

AddDistrict(AD)
AD = null;
}