diff --git a/_header.php b/_header.php
index 979c5f7..16f4695 100644
--- a/_header.php
+++ b/_header.php
@@ -10,7 +10,7 @@ session_start();
                 <span class="navbar-toggler-icon"></span>
             </button>
             <div class="collapse navbar-collapse" id="main-nav">
-                <ul class="navbar-nav ms-auto mb-2 mb-lg-0">
+                <ul class="navbar-nav mx-auto mb-2 mb-lg-0">
                     <li class="nav-item">
                         <a class="nav-link" href="index.php#services">Servizi</a>
                     </li>
@@ -21,7 +21,7 @@ session_start();
                         <a class="nav-link" href="contact.php">Contattaci</a>
                     </li>
                 </ul>
-                <ul class="navbar-nav ms-lg-3">
+                <ul class="navbar-nav">
                     <?php if (isset($_SESSION['user_id'])):
                     ?>
                         <li class="nav-item dropdown">
diff --git a/assets/js/main.js b/assets/js/main.js
index e6d207e..d561629 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -1 +1,53 @@
 // Main javascript file
+
+document.addEventListener('DOMContentLoaded', function() {
+    const locationInputs = document.querySelectorAll('input[name="location"]');
+    if (locationInputs.length === 0) {
+        return;
+    }
+
+    const COMUNI_URL = 'https://raw.githubusercontent.com/matteocontrini/comuni-json/master/comuni.json';
+    const IP_GEOLOCATION_URL = 'http://ip-api.com/json';
+
+    // Create a datalist for suggestions
+    const datalist = document.createElement('datalist');
+    datalist.id = 'comuni-list';
+    document.body.appendChild(datalist);
+
+    // Attach the datalist to the input fields
+    locationInputs.forEach(input => {
+        input.setAttribute('list', datalist.id);
+        input.setAttribute('autocomplete', 'off'); // Disable browser's own autocomplete
+    });
+
+    // Fetch comuni and populate datalist
+    fetch(COMUNI_URL)
+        .then(response => response.json())
+        .then(data => {
+            data.forEach(comune => {
+                const option = document.createElement('option');
+                option.value = comune.nome;
+                datalist.appendChild(option);
+            });
+        })
+        .catch(error => {
+            console.error('Error fetching Italian municipalities:', error);
+        });
+
+    // Fetch IP-based geolocation and pre-fill the input
+    fetch(IP_GEOLOCATION_URL)
+        .then(response => response.json())
+        .then(data => {
+            if (data && data.city) {
+                locationInputs.forEach(input => {
+                    // Only set the value if the input is currently empty
+                    if (input.value.trim() === '') {
+                        input.value = data.city;
+                    }
+                });
+            }
+        })
+        .catch(error => {
+            console.error('Error fetching IP geolocation:', error);
+        });
+});
\ No newline at end of file