增加 JS 判断元素错误

js/flatpickr.js

@@ -28,10 +28,10 @@ function validateQuickInquiryForm() {
     var emailErrEl = document.getElementById("email_errmsg");
     var emailVerifyErrEl = document.getElementById("email_verify_errmsg");
 
-    realnameErrEl.style.display = 'none';
+    if (realnameErrEl) realnameErrEl.style.display = 'none';
-    emailErrEl.style.display = 'none';
+    if (emailErrEl) emailErrEl.style.display = 'none';
-    emailVerifyErrEl.style.display = 'none';
+    if (emailVerifyErrEl) emailVerifyErrEl.style.display = 'none';
-    startingDateErrEl.style.display = 'none';
+    if (startingDateErrEl) startingDateErrEl.style.display = 'none';
 
     if (realnameVal === '') {
         realnameErrEl.style.display = '';