diff --git a/drcr/templates/journal/journal_edit_transaction.html b/drcr/templates/journal/journal_edit_transaction.html
index a989a5c..c37ac3d 100644
--- a/drcr/templates/journal/journal_edit_transaction.html
+++ b/drcr/templates/journal/journal_edit_transaction.html
@@ -97,7 +97,7 @@
 		{{ 'Edit' if transaction and transaction.id else 'New' }} transaction
 	</h1>
 	
-	<form method="POST">
+	<form method="POST" id="edit-transaction-form">
 		<table class="min-w-full">
 			<thead>
 				<tr class="border-b border-gray-300">
@@ -220,19 +220,14 @@
 		}
 		
 		function changeAmount(el) {
-			let amountInputs = document.querySelectorAll('input[name="amount"]');
+			let amountInputs = document.querySelectorAll('#edit-transaction-form input[name="amount"]');
 			if (amountInputs.length === 2) {
-				// Get other input
-				let otherInput;
 				for (inp of amountInputs) {
 					if (inp !== el) {
-						otherInput = inp;
-						break;
+						// Update other input with amount
+						inp.value = el.value;
 					}
 				}
-				
-				// Update other input with amount
-				otherInput.value = el.value;
 			}
 		}
 	</script>