promise code

function update_STAR()
{
var tran_no = $("#dd_starlist :selected").text();
var no = (tran_no.length)/10;
unattachSTARs(no).then(update_AI_starLists());
}

function unattachSTARs(no)
{
    var promises = [];
    var tran_no = $("#dd_starlist :selected").text();
    for(var i=0; i < no; i++)
    {
    stars[i] = tran_no.substring((i*10),(i*10)+10);
    var url1 = "https://XYZ.quickbase.com/db/bgttp2a33?act=API_DoQuery&query={6.EX." + stars[i] + "}&clist=3.6.101.44";

    promises.push($.get(url1).then(function(data){
    var rid = $("record_id_",data).text();
    var url2 = "https://XYZ.quickbase.com/db/bgttp2a33?act=API_EditRecord&rid=" + rid + "&_fid_44=''";
    return $.post(url2)
    }));
    }
    return $.when.apply($.promises);
}

function update_AI_starLists()
{
    var timestamp = new Date().getTime();
    var fvalue1 =""; var fvalue2 =""; var trans; var all_stars= "";
    var url1 = "https://XYZ.quickbase.com/db/bgttp2a33?act=API_DoQuery&query={44.EX."+ kRid + "}&clist=6.14&rand=" +timestamp;

   return ($.get(url1).then(function(xml)
   {
    $("record",xml).each(function()
    {
                all_stars+=  $(this).find('transaction_number').text() + "<br>";

                if($(this).find('latest_star_status').text().toUpperCase() == "CLOSED")
                fvalue1+= $(this).find('transaction_number').text() + "<br>";

                else
                fvalue2+= $(this).find('transaction_number').text() + "<br>";
    });

    var url2="https://XYZ.quickbase.com/db/bgttp2a24?act=API_EditRecord&rid="+kRid+"&_fid_124="+all_stars+"&_fid_126="+fvalue2+"&_fid_125="+fvalue1+"&rand="+timestamp;

        return $.post(url2)
        }).then(update_dropdown()));
}

function update_dropdown()
{
var timestamp=new Date().getTime();
var url1='https://XYZ.quickbase.com/db/bgttp2a33?act=API_DoQuery&query={44.EX.'+kRid+'}&clist="0.6.14.44"&includeRids=1&rand='+timestamp;
var x = document.getElementById("dd_starlist");
$("#dd_starlist").html("");

$.get(url1,function(xml){
  $("record",xml).each(function()
  {
    var option = document.createElement("option");
    option.text = $(this).find('transaction_number').text();
    option.value = $(this).find('transaction_number').text();
    x.add(option);
  });
 });
}