diff --git a/web/templates/register.templ b/web/templates/register.templ
index bd7331a..1c02523 100644
--- a/web/templates/register.templ
+++ b/web/templates/register.templ
@@ -95,7 +95,7 @@ templ RegisterForm(groups []models.Group, isAdmin bool) {
             <script>
                 function validateForm() {
                     const carNumberInput = document.getElementById('car-number');
-                    const errorDiv = carNumberInput.nextElementSibling;
+                    const errorDiv = document.getElementById('car-number-validation-error');
                     
                     if (errorDiv.textContent.trim() !== '') {
                         // Show error message more prominently
diff --git a/web/templates/register_templ.go b/web/templates/register_templ.go
index 36cf816..d6834f0 100644
--- a/web/templates/register_templ.go
+++ b/web/templates/register_templ.go
@@ -140,7 +140,7 @@ func RegisterForm(groups []models.Group, isAdmin bool) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 10, "</div></form><script>\r\n                function validateForm() {\r\n                    const carNumberInput = document.getElementById('car-number');\r\n                    const errorDiv = carNumberInput.nextElementSibling;\r\n                    \r\n                    if (errorDiv.textContent.trim() !== '') {\r\n                        // Show error message more prominently\r\n                        errorDiv.classList.add('d-block');\r\n                        carNumberInput.classList.add('is-invalid');\r\n                        return false;\r\n                    } else {\r\n                        errorDiv.classList.remove('d-block');\r\n                        carNumberInput.classList.remove('is-invalid');\r\n                    }\r\n                    \r\n                    return true;\r\n                }\r\n            </script></div></div>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 10, "</div></form><script>\r\n                function validateForm() {\r\n                    const carNumberInput = document.getElementById('car-number');\r\n                    const errorDiv = document.getElementById('car-number-validation-error');\r\n                    \r\n                    if (errorDiv.textContent.trim() !== '') {\r\n                        // Show error message more prominently\r\n                        errorDiv.classList.add('d-block');\r\n                        carNumberInput.classList.add('is-invalid');\r\n                        return false;\r\n                    } else {\r\n                        errorDiv.classList.remove('d-block');\r\n                        carNumberInput.classList.remove('is-invalid');\r\n                    }\r\n                    \r\n                    return true;\r\n                }\r\n            </script></div></div>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}