diff --git a/etools-upload.html b/etools-upload.html
index 16824be..82abca6 100644
--- a/etools-upload.html
+++ b/etools-upload.html
@@ -313,10 +313,10 @@
       isValidURL(str) {
         const pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
             '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.?)+[a-z]{2,}|'+ // domain name
-            '((\\d{1,3}\\.){3}\\d{1,3}))'+ // ip (v4) address
-            '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*'+ //port
+            '((\\d{1,3}\\.){3}\\d{1,3}))?'+ // ip (v4) address
+            '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*'+ //port + path
             '(\\?[;&a-z\\d%_.~+=-]*)?'+ // query string
-            '(\\#[-a-z\\d_]*)?$','i');
+            '(\\#[-a-z\\d_]*)?$','i');// hash
         return pattern.test(str);
       }