function CustomValidationSummaryOnSubmit(validationGroup) {
  if (typeof (Page_ValidationSummaries) == "undefined") {
      return;
  }
  var summary, sums, s;
  for (sums = 0; sums < Page_ValidationSummaries.length; sums++) {
      summary = Page_ValidationSummaries[sums];
      summary.style.display = "none";
      if (!Page_IsValid &&
          IsValidationGroupMatch(summary, validationGroup)) {
          var i;
          if (summary.showsummary != "False") {
              summary.style.display = "";
              if (typeof (summary.displaymode) != "string") {
                  summary.displaymode = "BulletList";
              }
              switch (summary.displaymode) {
                case "List":
                  headerSep = "";
                  first = "";
                  pre = "";
                  post = "";
                  end = "";
                  break;
                case "BulletList":
                default:
                  headerSep = "";
                  first = " * ";
                  pre = "";
                  post = "";
                  end = "";
                  break;
                case "SingleParagraph":
                  headerSep = " ";
                  first = "";
                  pre = "";
                  post = " ";
                  end = "";
                  break;
              }
              s = "";
              if (typeof (summary.headertext) == "string") {
                s += summary.headertext + headerSep;
              }
              s += first;
              for (i = 0; i < Page_Validators.length; i++) {
                if (!Page_Validators[i].isvalid &&
                    typeof (Page_Validators[i].errormessage) == "string") {
                    s += pre + Page_Validators[i].errormessage + post;
                }
              }
              s += end;
              summary.innerHTML = s;
              window.scrollTo(0, 0);
          }
          if (summary.showmessagebox == "True") {
            s = "";
            if (typeof (summary.headertext) == "string") {
                s += summary.headertext + "                   \r\n\r\n";
            }
            var lastValIndex = Page_Validators.length - 1;
            for (i = 0; i <= lastValIndex; i++) {
              if (!Page_Validators[i].isvalid &&
                  typeof (Page_Validators[i].errormessage) == "string") {
                  switch (summary.displaymode) {
                    case "List":
                      s += Page_Validators[i].errormessage;
                      if (i < lastValIndex) {
                          s += "\r\n";
                      }
                      break;
                    case "BulletList":
                    default:
                      s += " * " + Page_Validators[i].errormessage;
                      if (i < lastValIndex) {
                          s += "\r\n";
                      }
                      break;
                    case "SingleParagraph":
                      s += Page_Validators[i].errormessage + " ";
                      break;
                  }
              }
            }
            alert(s);
          }
      }
  }
}