function getAllLocations() {
   removeAllOptions();
   addOption_Location();
}

function locationGetHotel() {
    
    var locationcombo = document.getElementById("SelectLocation");
    var hotelcombo = document.getElementById("SelectHotel");
    if (locationcombo.options[locationcombo.selectedIndex].value == "1") {
        removeAllOptions();
        addOption_Location();
    }
    else if (locationcombo.options[locationcombo.selectedIndex].value == "2") {
        removeAllOptions();
        addOption_Istanbul();
    }
    else if (locationcombo.options[locationcombo.selectedIndex].value == "3") {
        removeAllOptions();
        addOption_Antalya();
    }
    else if (locationcombo.options[locationcombo.selectedIndex].value == "4") {
        removeAllOptions();
        addOption_Bodrum();
    }
    else if (locationcombo.options[locationcombo.selectedIndex].value == "5") {
        removeAllOptions();
        addOption_Manhattan();
    }
}

function removeAllOptions() {
    var removehotelcombo = document.getElementById("SelectHotel");
    var i;
    for (i = removehotelcombo.options.length - 1; i >= 0; i--) {
        removehotelcombo.remove(i);
    }
}

function addOption(selectbox, text, value) {
    var optn = document.createElement("OPTION");
    optn.text = text;
    optn.value = value;
    selectbox.options.add(optn);
}

function addOption_Location() {
    addOption(document.BookNowForm.SelectHotel, "The Marmara Pera", "14794");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Şişli", "16959");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Taksim", "14822");
    addOption(document.BookNowForm.SelectHotel, "Çamlıca Residence", "14823");
    addOption(document.BookNowForm.SelectHotel, "Pendik Residence", "14821");
    addOption(document.BookNowForm.SelectHotel, "Suadiye Residence", "14824");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Antalya", "14793");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Bodrum", "14795");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Manhattan", "14825");
    document.BookNowForm.SelectLocation.selectedIndex = 0;
    document.BookNowForm.SelectHotel.selectedIndex = 0;
}

function addOption_Istanbul() {
    addOption(document.BookNowForm.SelectHotel, "The Marmara Pera", "14794");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Şişli", "16959");
    addOption(document.BookNowForm.SelectHotel, "The Marmara Taksim", "14822");
    addOption(document.BookNowForm.SelectHotel, "Çamlıca Residence", "14823");
    addOption(document.BookNowForm.SelectHotel, "Pendik Residence", "14821");
    addOption(document.BookNowForm.SelectHotel, "Suadiye Residence", "14824");
    document.BookNowForm.SelectHotel.selectedIndex = 0;
}

function addOption_Antalya() {
    addOption(document.BookNowForm.SelectHotel, "The Marmara Antalya", "14793");
    document.BookNowForm.SelectHotel.selectedIndex = 0;
}

function addOption_Bodrum() {
    addOption(document.BookNowForm.SelectHotel, "The Marmara Bodrum", "14795");
    document.BookNowForm.SelectHotel.selectedIndex = 0;
}

function addOption_Manhattan() {
    addOption(document.BookNowForm.SelectHotel, "The Marmara Manhattan", "14825");
    document.BookNowForm.SelectHotel.selectedIndex = 0;
}