diff --git a/static/main.js b/static/main.js
index 6fd5249..0f0025e 100644
--- a/static/main.js
+++ b/static/main.js
@@ -1,14 +1,14 @@
 // Example starter JavaScript for disabling form submissions if there are invalid fields
-(function () {
+(function() {
     'use strict';
-    window.addEventListener('load', function () {
+    window.addEventListener('load', function() {
         update_total_due();
         update_paper_id_field();
         // Fetch all the forms we want to apply custom Bootstrap validation styles to
         var forms = document.getElementsByClassName('needs-validation');
         // Loop over them and prevent submission
-        var validation = Array.prototype.filter.call(forms, function (form) {
-            form.addEventListener('submit', function (event) {
+        var validation = Array.prototype.filter.call(forms, function(form) {
+            form.addEventListener('submit', function(event) {
                 if (form.checkValidity() === false) {
                     event.preventDefault();
                     event.stopPropagation();
@@ -24,7 +24,7 @@
 
 
     if ($('#participate').is(":checked")) {
-        costs += parseInt($("#conference_fee").text(),10);
+        costs += parseInt($("#conference_fee").text(), 10);
         if ($('#student').is(":checked")) {
             costs -= parseInt($("#student_discount").text(), 10);
         }
@@ -32,7 +32,7 @@
             costs += parseInt($("#conference_dinner_price").text(), 10);
         }
     }
-    $("#total_due").val(costs.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2}));
+    $("#total_due").val(costs.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 }));
 }
 
 function update_paper_id_field() {
@@ -42,7 +42,11 @@
         paper_id.attr('placeholder', '0000');
         paper_id.attr('pattern', '\\d{4}');
         paper_id.attr('required', 'required');
+        //if (paper_id.attr('oldval').match(/^\\d{4}$/)) {
+        //    paper_id.val(paper_id.attr('oldval'));
+        //}
     } else {
+        paper_id.attr('oldval', paper_id.val());
         paper_id.val('');
         paper_id.attr('disabled', 'disabled');
         paper_id.removeAttr('placeholder');
@@ -80,7 +84,7 @@
 REP_NE = 'Passwords not identical';
 PWNED = 'Password found in public password list';
 
-String.prototype.strReverse = function () {
+String.prototype.strReverse = function() {
     var newstring = '';
     for (var s = 0; s < this.length; s++)
         newstring = this.charAt(s) + newstring;
@@ -91,7 +95,7 @@
     const sha1Hash = CryptoJS.enc.Hex.stringify(CryptoJS.SHA1(pass)).toUpperCase();
     const passwordChunk1 = sha1Hash.substring(0, 5);
     const passwordChunk2 = sha1Hash.substring(5);
-    $.get('https://api.pwnedpasswords.com/range/' + passwordChunk1).done(function (data, status) {
+    $.get('https://api.pwnedpasswords.com/range/' + passwordChunk1).done(function(data, status) {
         var isPwned = false;
         if (status == "success") {
             if (data && data.length) {
@@ -134,24 +138,33 @@
         nScore = 4 * nLength;
 
         // check for upper-/lowercase, numeric and special chars pattern matches
-        var nAlphaUC = 0, nAlphaLC = 0, nNumber = 0, nSpecial = 0;
-        var nMidChar = 0, nRepChar = 0, nRepInc = 0;
-        var nConsecAlphaUC = 0, nConsecAlphaLC = 0, nConsecNumber = 0;
-        var nTmpAlphaUC = '', nTmpAlphaLC = '', nTmpNumber = '';
+        var nAlphaUC = 0,
+            nAlphaLC = 0,
+            nNumber = 0,
+            nSpecial = 0;
+        var nMidChar = 0,
+            nRepChar = 0,
+            nRepInc = 0;
+        var nConsecAlphaUC = 0,
+            nConsecAlphaLC = 0,
+            nConsecNumber = 0;
+        var nTmpAlphaUC = '',
+            nTmpAlphaLC = '',
+            nTmpNumber = '';
         for (var i = 0; i < nLength; i++) {
-            if (pass[i].match(/[A-Z]/g)) {   // uppercase characters
+            if (pass[i].match(/[A-Z]/g)) { // uppercase characters
                 if (nTmpAlphaUC !== '' && (nTmpAlphaUC + 1) == i) {
                     nConsecAlphaUC++;
                 }
                 nTmpAlphaUC = i;
                 nAlphaUC++;
-            } else if (pass[i].match(/[a-z]/g)) {   // lowercase characters
+            } else if (pass[i].match(/[a-z]/g)) { // lowercase characters
                 if (nTmpAlphaLC !== '' && (nTmpAlphaLC + 1) == i) {
                     nConsecAlphaLC++;
                 }
                 nTmpAlphaLC = i;
                 nAlphaLC++;
-            } else if (pass[i].match(/[0-9]/g)) {   // numbers
+            } else if (pass[i].match(/[0-9]/g)) { // numbers
                 if (i > 0 && i < (nLength - 1)) {
                     nMidChar++;
                 }
@@ -160,7 +173,7 @@
                 }
                 nTmpNumber = i;
                 nNumber++;
-            } else {   // special characters
+            } else { // special characters
                 if (i > 0 && i < (nLength - 1)) {
                     nMidChar++;
                 }
@@ -188,8 +201,8 @@
         for (var i = 0; i < 23; i++) {
             var sFwd = sAlphas.substring(i, i + 3);
             var sRev = sFwd.strReverse();
-            if (pass.toLowerCase().indexOf(sFwd) != -1
-                || pass.toLowerCase().indexOf(sRev) != -1)
+            if (pass.toLowerCase().indexOf(sFwd) != -1 ||
+                pass.toLowerCase().indexOf(sRev) != -1)
                 nSeqAlpha++;
         }
 
@@ -199,41 +212,41 @@
         for (var i = 0; i < 8; i++) {
             var sFwd = sNumerics.substring(i, i + 3);
             var sRev = sFwd.strReverse();
-            if (pass.toLowerCase().indexOf(sFwd) != -1
-                || pass.toLowerCase().indexOf(sRev) != -1)
+            if (pass.toLowerCase().indexOf(sFwd) != -1 ||
+                pass.toLowerCase().indexOf(sRev) != -1)
                 nSeqNumber++;
         }
 
         // general point assignment
-        if (nAlphaUC > 0 && nAlphaUC < nLength)   // uppercase characters
+        if (nAlphaUC > 0 && nAlphaUC < nLength) // uppercase characters
             nScore += 2 * (nLength - nAlphaUC);
-        if (nAlphaLC > 0 && nAlphaLC < nLength)   // lowercase characters
+        if (nAlphaLC > 0 && nAlphaLC < nLength) // lowercase characters
             nScore += 2 * (nLength - nAlphaLC);
-        if (nNumber > 0 && nNumber < nLength)   // numbers
+        if (nNumber > 0 && nNumber < nLength) // numbers
             nScore += 2 * nNumber;
-        if (nSpecial > 0)   // special characters
+        if (nSpecial > 0) // special characters
             nScore += 4 * nSpecial;
-        if (nMidChar > 0)   // mid numbers/special characters
+        if (nMidChar > 0) // mid numbers/special characters
             nScore += 2 * nMidChar;
 
         // point deductions for poor practices
-        if ((nAlphaLC > 0 || nAlphaUC > 0)
-            && nSpecial === 0 && nNumber === 0)   // characters only
+        if ((nAlphaLC > 0 || nAlphaUC > 0) &&
+            nSpecial === 0 && nNumber === 0) // characters only
             nScore -= nLength;
-        if (nAlphaLC === 0 && nAlphaUC === 0
-            && nSpecial === 0 && nNumber > 0)   // numbers only
+        if (nAlphaLC === 0 && nAlphaUC === 0 &&
+            nSpecial === 0 && nNumber > 0) // numbers only
             nScore -= nLength;
-        if (nRepChar > 0)   // same character exists more than once
+        if (nRepChar > 0) // same character exists more than once
             nScore -= nRepInc;
-        if (nConsecAlphaUC > 0)   // consecutive uppercase letters exist
+        if (nConsecAlphaUC > 0) // consecutive uppercase letters exist
             nScore -= 2 * nConsecAlphaUC;
-        if (nConsecAlphaLC > 0)   // consecutive lowercase letters exist
+        if (nConsecAlphaLC > 0) // consecutive lowercase letters exist
             nScore -= 2 * nConsecAlphaLC;
-        if (nConsecNumber > 0)   // consecutive numbers exist
+        if (nConsecNumber > 0) // consecutive numbers exist
             nScore -= 2 * nConsecNumber;
-        if (nSeqAlpha > 0)   // sequential alpha strings exist (3 chars or more)
+        if (nSeqAlpha > 0) // sequential alpha strings exist (3 chars or more)
             nScore -= 3 * nSeqAlpha;
-        if (nSeqNumber > 0)   // sequential numeric strings exist (3 chars or more)
+        if (nSeqNumber > 0) // sequential numeric strings exist (3 chars or more)
             nScore -= 3 * nSeqNumber;
 
         // determine if mandatory requirements have been met
@@ -289,7 +302,7 @@
         $("#password-div")[0].classList.add('was-validated');
         $('#btn_change').prop('disabled', pass !== pass2);
         $("#pw1")[0].setCustomValidity("");
-        isPasswordPwned(pass, function (isPwned) {
+        isPasswordPwned(pass, function(isPwned) {
             if (isPwned) {
                 $('#pwqinfo').val(PWNED);
                 progress.removeClass().addClass('low');
@@ -303,4 +316,4 @@
         $("#pw1")[0].setCustomValidity("Password is to week");
     }
 
-}
+}
\ No newline at end of file