title: Display confirmation message before send ajax request
body: <p>I have written an <code>ajax</code> function where I want to display confirmation meeessage before submitting the form. How should I add with my condition. Below is my code.</p>
  
  <pre><code>$.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,
                          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";
                          }
                      })
                  },
                  error: function (xhr) {
                      alert('Error while selecting list..!!');
                      window.location.href = "ErrorPage.aspx";
                  }
  </code></pre>