diff --git a/TODO b/TODO
index c350cd0..63fab3c 100755
--- a/TODO
+++ b/TODO
@@ -3,10 +3,11 @@
 * tokens + ban system
 * remember me
 * htmlspecialchars => on users objects
+* handle negative amounts
+* Refactor load method to avoir load_* methods !
 
 install.php :
 =============
-* Link beside password field to toggle visible / not visible
 * TRUNCATE before CREATE TABLE in install.php
 
 inc/Invoices.class.php :
@@ -20,10 +21,11 @@ index.php?do=new_invoice :
 ==========================
 * Improve date handling for form display
 * Onchange not working as wanted
+* Handle date/months
 
 index.php?do=settings :
 =======================
 * Prefill the timezone field
-* Fill the fields with POST
-* Handle checkboxes in PHP ?
-* JavaScript to handle singular / plural + months
+
+Manage paybacks :
+=================
diff --git a/index.php b/index.php
index 0b8e850..11e5774 100644
--- a/index.php
+++ b/index.php
@@ -268,6 +268,17 @@
             $tpl->draw('new_invoice');
             break;
 
+        case 'delete_invoice':
+            if(!empty($_GET['id'])) {
+                $invoice = new Invoice();
+                $invoice->setId($_GET['id']);
+                $invoice->delete();
+
+                header('location: index.php');
+                exit();
+            }
+            break;
+
         default:
             $users_list = new User();
             $users_list = $users_list->load_users();
diff --git a/install.php b/install.php
index e0ecfba..0771dad 100644
--- a/install.php
+++ b/install.php
@@ -83,6 +83,7 @@
         <meta charset="utf-8">
         <title>Bouffe@Ulm - Installation</title>
         <link rel="stylesheet" media="screen" type="text/css" href="tpl/css/style.css" />
+        <script type="text/javascript" src="tpl/js/main.js"></script>
     </head>
     <body id="install">
         <h1 class="center">Bouffe@Ulm - Installation</h1>
@@ -101,7 +102,7 @@
                 <p><label for="mysql_host">MySQL host : </label><input type="text" name="mysql_host" id="mysql_host" value="<?php echo (!empty($_POST['mysql_host'])) ? htmlspecialchars($_POST['mysql_host']) : 'localhost';?>"/></p>
 
                 <p><label for="mysql_login">MySQL login : </label><input type="text" name="mysql_login" id="mysql_login" value="<?php echo (!empty($_POST['mysql_login'])) ? htmlspecialchars($_POST['mysql_login']) : '';?>"/></p>
-                <p><label for="mysql_password">MySQL password : </label><input type="password" name="mysql_password" id="mysql_password"/></p>
+                <p><label for="mysql_password">MySQL password : </label><input type="password" name="mysql_password" id="mysql_password"/> <a href="" onclick="toggle_password('mysql_password'); return false;"><img src="img/toggle_password.jpg" alt="Toggle visible"/></a></p>
                 <p>
                 <label for="mysql_db">Name of the MySQL database to use : </label><input type="text" name="mysql_db" id="mysql_db" value="<?php echo (!empty($_POST['mysql_db'])) ? htmlspecialchars($_POST['mysql_db']) : 'Bouffe@Ulm';?>"/><br/>
                     <em>Note :</em> You <em>must</em> create this database first.
@@ -126,7 +127,7 @@
                 <legend>Administrator</legend>
                 <p><label for="admin_login">Username of the admin : </label><input type="text" name="admin_login" id="admin_login" <?php echo (!empty($_POST['admin_login'])) ? 'value="'.htmlspecialchars($_POST['admin_login']).'"' : '';?>/></p>
                 <p><label for="admin_display_name">Displayed name for admin user : </label><input type="text" name="admin_display_name" id="admin_display_name" <?php echo (!empty($_POST['admin_display_name']) ? 'value="'.htmlspecialchars($_POST['admin_display_name']).'"' : '');?>/></p>
-                <p><label for="admin_password">Password for the admin : </label><input type="password" name="admin_password" id="admin_password"/></p>
+                <p><label for="admin_password">Password for the admin : </label><input type="password" name="admin_password" id="admin_password"/> <a href="" onclick="toggle_password('admin_password'); return false;"><img src="img/toggle_password.jpg" alt="Toggle visible"/></a></p>
             </fieldset>
             <p class="center"><input <?php echo (!empty($block_form)) ? 'disabled ' : '';?>type="submit" value="Install"></p>
         </form>
diff --git a/tmp/settings.af3906cfde643ae7f290cfdc51cc9342.rtpl.php b/tmp/settings.af3906cfde643ae7f290cfdc51cc9342.rtpl.php
index c617c6a..fca6810 100755
--- a/tmp/settings.af3906cfde643ae7f290cfdc51cc9342.rtpl.php
+++ b/tmp/settings.af3906cfde643ae7f290cfdc51cc9342.rtpl.php
@@ -25,7 +25,7 @@
 
         <p><label for="mysql_login">MySQL login : </label><input type="text" name="mysql_login" id="mysql_login" value="<?php echo $mysql_login;?>"/></p>
         <p>
-            <label for="mysql_password">MySQL password : </label><input type="password" name="mysql_password" id="mysql_password"/><br/>
+            <label for="mysql_password">MySQL password : </label><input type="password" name="mysql_password" id="mysql_password"/> <a href="" onclick="toggle_password('mysql_password'); return false;"><img src="tpl/tpl/img/toggle_password.jpg" alt="Toggle visible"/></a><br/>
             <em>Note :</em> Leave the above field blank if you don't want to change your password.
         </p>
         <p>
@@ -44,6 +44,10 @@
             <em>Note :</em> This is the base URL from which you access this page. You must keep the trailing "/" in the above address.
         </p>
         <p><label for="currency">Currency : </label><input type="text" name="currency" id="currency" size="3" value="<?php echo $currency;?>"/></p>
+        <p>
+            <label for="timezone">Timezone : </label><input type="text" name="timezone" id="timezone" value="<?php echo $timezone;?>"/><br/>
+            <em>For example :</em> Europe/Paris. See the doc for more info.
+        </p>
     </fieldset>
     <p class="center"><input type="submit" value="Update settings"></p>
 </form>
diff --git a/tpl/js/main.js b/tpl/js/main.js
index 48608e0..cb6bb80 100644
--- a/tpl/js/main.js
+++ b/tpl/js/main.js
@@ -8,3 +8,10 @@ function guest_user_label(id) {
     else
         document.getElementById('guest_user_'+id+'_label').innerHTML = ' guest';
 }
+
+function toggle_password(id) {
+    if(document.getElementById(id).type == 'password')
+        document.getElementById(id).type = 'text';
+    else
+        document.getElementById(id).type = 'password';
+}
diff --git a/tpl/settings.html b/tpl/settings.html
index d5f2e3a..19b57af 100644
--- a/tpl/settings.html
+++ b/tpl/settings.html
@@ -22,7 +22,7 @@
 
         <p><label for="mysql_login">MySQL login : </label><input type="text" name="mysql_login" id="mysql_login" value="{$mysql_login}"/></p>
         <p>
-            <label for="mysql_password">MySQL password : </label><input type="password" name="mysql_password" id="mysql_password"/><br/>
+            <label for="mysql_password">MySQL password : </label><input type="password" name="mysql_password" id="mysql_password"/> <a href="" onclick="toggle_password('mysql_password'); return false;"><img src="img/toggle_password.jpg" alt="Toggle visible"/></a><br/>
             <em>Note :</em> Leave the above field blank if you don't want to change your password.
         </p>
         <p>
