var $form = $('form#contactform'),
    url1 = 'https://script.google.com/macros/s/AKfycbwbRm9bc3H3GOCgHHsGG4BvDPTS5B2bV6WZinXbKPUDm0AyiBs/exec'

$.fn.serializeObject = function()
{
 var o = {};
 var a = this.serializeArray();
 $.each(a, function() {
 if (o[this.name]) {
 if (!o[this.name].push) {
 o[this.name] = [o[this.name]];
 }
 o[this.name].push(this.value || "");
 } else {
 o[this.name] = this.value || "";
 }
 });
 return o;
};

$('#submit-form').on('click', function(e) {
  e.preventDefault();
  var jqxhr = $.ajax({
    url: url1,
    method: "GET",
    dataType: "json",
    data: $form.serializeObject()
  })
})