จะปรับโค้ด javascript ไม่ไห้มันคิดเลขตัวกลับ ต้องลบโค้ดส่วนไหนออกครับ

 <script type="text/javascript">

         var nd = true;

         function no_dup(v) {
             nd = !v;
             genfunction();
         }

         function genfunction() {
             var x = document.getElementsByClassName("choice");
             var number_set = [];
             var j = 0;
             for (i = 0; i < x.length; i++)
                 if (x[i].checked) {
                     number_set[j++] = x[i].value;
                 }

             var price = document.getElementById("price").value;

             var two_digit = "";
             var three_digit = "";
             for (i = 0; i < number_set.length; i++)
                 for (j = 0 ; j < number_set.length; j++) {
                     if (nd || (number_set[i] != number_set[j]))
                        two_digit += number_set[i] + "" + number_set[j] + " " + price + " ";
                     for (k = 0; k < number_set.length; k++)
                         if (nd || ((number_set[i] != number_set[j]) && (number_set[k] != number_set[j]) && (number_set[k] != number_set[i]))) three_digit += number_set[i] + "" + number_set[j] + "" + number_set[k] + " " + price + " ";
                 }

             if (two_digit != "") two_digit = two_digit.substr(0, two_digit.length - 2);
             if (three_digit != "") three_digit = three_digit.substr(0, three_digit.length - 2);

             document.getElementById("result").innerHTML = two_digit;
             document.getElementById("result2").innerHTML = three_digit;
         }

         function copy2clipboard1() {
             copyToClipboard(document.getElementById("result").innerHTML);
         }
         function copy2clipboard2() {
             copyToClipboard(document.getElementById("result2").innerHTML);
         }

         function copyToClipboard(text) {
             if (window.clipboardData && window.clipboardData.setData) {
                 // IE specific code path to prevent textarea being shown while dialog is visible.
                 return clipboardData.setData("Text", text);

             } else if (document.queryCommandSupported && document.queryCommandSupported("copy")) {
                 var textarea = document.createElement("textarea");
                 textarea.textContent = text;
                 textarea.style.position = "fixed";  // Prevent scrolling to bottom of page in MS Edge.
                 document.body.appendChild(textarea);
                 textarea.select();
                 try {
                     return document.execCommand("copy");  // Security exception may be thrown by some browsers.
                 } catch (ex) {
                     console.warn("Copy to clipboard failed.", ex);
                     return false;
                 } finally {
                     document.body.removeChild(textarea);
                 }
             }
         }
     </script>