diff --git a/src/accounting/static/js/journal-entry-editor.js b/src/accounting/static/js/journal-entry-editor.js
index 5db61d8..c60810b 100644
--- a/src/accounting/static/js/journal-entry-editor.js
+++ b/src/accounting/static/js/journal-entry-editor.js
@@ -208,6 +208,12 @@ class JournalEntryEditor {
      */
     #accountSelectors = {};
 
+    /**
+     * The original entry selector
+     * @type {OriginalEntrySelector}
+     */
+    originalEntrySelector;
+
     /**
      * Constructs a new journal entry editor.
      *
@@ -236,7 +242,8 @@ class JournalEntryEditor {
         for (const entryType of ["debit", "credit"]) {
             this.#accountSelectors[entryType] = new AccountSelector(this, entryType);
         }
-        this.#originalEntryControl.onclick = () => OriginalEntrySelector.start(this, this.originalEntryId);
+        this.originalEntrySelector = new OriginalEntrySelector();
+        this.#originalEntryControl.onclick = () => this.originalEntrySelector.onOpen(this, this.originalEntryId)
         this.#originalEntryDelete.onclick = () => this.clearOriginalEntry();
         this.#summaryControl.onclick = () => this.#summaryEditors[this.entryType].onOpen();
         this.#accountControl.onclick = () => this.#accountSelectors[this.entryType].onOpen();
@@ -569,7 +576,7 @@ class JournalEntryEditor {
         if (this.originalEntryId === null) {
             return null;
         }
-        return OriginalEntrySelector.getNetBalance(this.entry, this.form, this.originalEntryId);
+        return this.originalEntrySelector.getNetBalance(this.entry, this.form, this.originalEntryId);
     }
 
     /**
diff --git a/src/accounting/static/js/original-entry-selector.js b/src/accounting/static/js/original-entry-selector.js
index d97c2a3..bf7957f 100644
--- a/src/accounting/static/js/original-entry-selector.js
+++ b/src/accounting/static/js/original-entry-selector.js
@@ -22,11 +22,6 @@
  */
 "use strict";
 
-// Initializes the page JavaScript.
-document.addEventListener("DOMContentLoaded", () => {
-    OriginalEntrySelector.initialize();
-});
-
 /**
  * The original entry selector.
  *
@@ -108,7 +103,7 @@ class OriginalEntrySelector {
      * @param originalEntryId {string} the ID of the original entry
      * @return {Decimal} the net balance of the original entry
      */
-    #getNetBalance(currentEntry, form, originalEntryId) {
+    getNetBalance(currentEntry, form, originalEntryId) {
         const otherEntries = form.getEntries().filter((entry) => entry !== currentEntry);
         let otherOffset = new Decimal(0);
         for (const otherEntry of otherEntries) {
@@ -178,7 +173,7 @@ class OriginalEntrySelector {
      * @param entryEditor {JournalEntryEditor} the journal entry editor
      * @param originalEntryId {string|null} the ID of the original entry
      */
-    #onOpen(entryEditor, originalEntryId) {
+    onOpen(entryEditor, originalEntryId = null) {
         this.entryEditor = entryEditor
         this.#modal.dataset.currencyCode = entryEditor.getCurrencyCode();
         this.#modal.dataset.entryType = entryEditor.entryType;
@@ -189,42 +184,6 @@ class OriginalEntrySelector {
         this.#updateNetBalances();
         this.#filterOptions();
     }
-
-    /**
-     * The original entry selector.
-     * @type {OriginalEntrySelector}
-     */
-    static #selector;
-
-    /**
-     * Initializes the original entry selector.
-     *
-     */
-    static initialize() {
-        this.#selector = new OriginalEntrySelector();
-    }
-
-    /**
-     * Starts the original entry selector.
-     *
-     * @param entryEditor {JournalEntryEditor} the journal entry editor
-     * @param originalEntryId {string|null} the ID of the original entry
-     */
-    static start(entryEditor, originalEntryId = null) {
-        this.#selector.#onOpen(entryEditor, originalEntryId);
-    }
-
-    /**
-     * Returns the net balance for an original entry.
-     *
-     * @param currentEntry {JournalEntrySubForm} the journal entry sub-form that is currently editing
-     * @param form {TransactionForm} the transaction form
-     * @param originalEntryId {string} the ID of the original entry
-     * @return {Decimal} the net balance of the original entry
-     */
-    static getNetBalance(currentEntry, form, originalEntryId) {
-        return this.#selector.#getNetBalance(currentEntry, form, originalEntryId);
-    }
 }
 
 /**
diff --git a/src/accounting/static/js/summary-editor.js b/src/accounting/static/js/summary-editor.js
index dad7d2f..8f336e0 100644
--- a/src/accounting/static/js/summary-editor.js
+++ b/src/accounting/static/js/summary-editor.js
@@ -132,7 +132,7 @@ class SummaryEditor {
         this.currentTab = this.tabPlanes.general;
         this.#initializeSuggestedAccounts();
         this.summary.onchange = () => this.#onSummaryChange();
-        this.#offsetButton.onclick = () => OriginalEntrySelector.start(this.#entryEditor);
+        this.#offsetButton.onclick = () => this.#entryEditor.originalEntrySelector.onOpen(this.#entryEditor);
         this.#form.onsubmit = () => {
             if (this.currentTab.validate()) {
                 this.#submit();