diff --git a/share/base.css b/share/base.css
index 4c69a13..3db7642 100644
--- a/share/base.css
+++ b/share/base.css
@@ -8,6 +8,11 @@
   right:0;
   overflow:auto;
   background-color:grey;
+  /* margin & border-width have to be 0, 
+   * otherwise pdf2htmlEX may not calculate the coordinates correctly
+   */
+  margin:0;
+  border-width:0;
 }
 .d {
   position:relative;
@@ -24,6 +29,11 @@
   height:100%;
   background-color:white;
   overflow: hidden;
+  /* margin & border-width have to be 0, 
+   * otherwise pdf2htmlEX may not calculate the coordinates correctly
+   */
+  margin:0;
+  border-width:0;
 }
 .b {
   position:absolute;
diff --git a/share/manifest b/share/manifest
index 8d36016..f282a05 100644
--- a/share/manifest
+++ b/share/manifest
@@ -29,7 +29,6 @@ $css
 """
 <script type="text/javascript">
 pdf2htmlEX.init('pdf-main');
-alert(pdf2htmlEX);
 </script>
 
 <title></title>