diff --git a/index.html b/index.html
index c48da24..73bcf53 100644
--- a/index.html
+++ b/index.html
@@ -180,7 +180,7 @@ <h3>
 
         </section>
 
-        <aside id="sidebar">
+        <aside id="sidebar" class="hidden-xs">
             <div id="navigation" data-spy="affix" data-offset-top="200">
                 <ul class="nav nav-pills nav-stacked">
                     <li class="active"><a href="#intro">Intro</a></li>
diff --git a/js/jquery.twbsPagination.js b/js/jquery.twbsPagination.js
index 948ac7f..73128a7 100644
--- a/js/jquery.twbsPagination.js
+++ b/js/jquery.twbsPagination.js
@@ -23,8 +23,14 @@
             throw new Error('Start page option is incorrect');
         }
 
-        if (this.options.totalPages <= 0) {
-            throw new Error('Total pages option cannot be less 1 (one)!');
+        this.options.totalPages = parseInt(this.options.totalPages);
+        if (isNaN(this.options.totalPages)) {
+            throw new Error('Total pages option is not correct!');
+        }
+
+        this.options.visiblePages = parseInt(this.options.visiblePages);
+        if (isNaN(this.options.visiblePages)) {
+            throw new Error('Visible pages option is not correct!');
         }
 
         if (this.options.totalPages < this.options.visiblePages) {
diff --git a/js/main.js b/js/main.js
index 243f14b..03bdc20 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,7 +1,7 @@
 $(document).ready(function () {
     $('#pagination-demo').twbsPagination({
-        totalPages: 35,
-        visiblePages: 7,
+        totalPages: "35",
+        visiblePages: "10",
         onPageClick: function (event, page) {
             $('#page-content').text('Page ' + page);
         }