Display confirmation message before send ajax request

Question

I have written an ajax function where I want to display confirmation meeessage before submitting the form. How should I add with my condition. Below is my code.

Answer 1

if ( confirm("Do you want to Submit?")) {
    // If you pressed OK!";

 $.ajax({
  url: "UBRDashboard.aspx/GetDllValue",
  dataType: "json",
  type: "POST",
  contentType: 'application/json; charset=utf-8',
  data: JSON.stringify({ ddlOduModel: ddlOduModel, ddlAntModel: ddlAntModel, ddlOMTModel: ddlOMTModel, ddlSapID: ddlSapID, ddlVendorName: ddlVendorName, strReqID: r.d, ddlSapDescVal: ddlSapDescVal, SITE_ADD: SITE_ADD, LATITUDE: LATITUDE, LONGITUDE: LONGITUDE, ddlEQP_SEQ: ddlEQP_SEQ, txtLinkID: txtLinkID, RJ_QUANTITY: RJ_QUANTITY, USER_NAME: USER_NAME, CREATED_DATE: CREATED_DATE, LOCATIONTYPE: LOCATIONTYPE, TOWERTYPE: TOWERTYPE }),
  async: true,
  processData: false,
  cache: false,
  beforeSend:function(){
     return confirm("Are you sure?");
  },
  success: function (r) {
    if (r.d == "OK") {
    alert('Record Saved successfully');
    window.location.href = "UBRDashboard.aspx";
  },
  error: function (xhr) {
         alert('Error while selecting list..!!');
         window.location.href = "ErrorPage.aspx";
  }
 });

} else {
    // If you pressed Cancel!";

}

Please check with window.confirm