diff --git a/base.php b/base.php
index 36f8f0f..9a47436 100644
--- a/base.php
+++ b/base.php
@@ -311,8 +311,6 @@ class EntryBook extends Entry
     
     public function getContentArray () {
         $entry = array ( "title" => $this->title);
-        $entry ["coverurl"] = $this->getCover ();
-        $entry ["thumbnailurl"] = $this->getCoverThumbnail ();
         $entry ["book"] = $this->book->getContentArray ();
         return $entry;
     }
diff --git a/book.php b/book.php
index 55d19f9..65c0a53 100644
--- a/book.php
+++ b/book.php
@@ -126,9 +126,9 @@ class Book extends Base {
             $su = $link->hrefXhtml ();
         }
         
-        return array ("hasCover" => $this->hasCover,
+        return array ("id" => $this->id,
+                      "hasCover" => $this->hasCover,
                       "preferedData" => $preferedData,
-                      "detailUrl" => $this->getDetailUrl (),
                       "rating" => $this->getRating (),
                       "pubDate" => $this->getPubDate (),
                       "languagesName" => $this->getLanguages (),
diff --git a/getJSON.php b/getJSON.php
index 24dc92e..bcda031 100644
--- a/getJSON.php
+++ b/getJSON.php
@@ -56,24 +56,28 @@
     }
     if (!is_null (getURLParam ("complete"))) { 
         $out ["const"] = array ("version" => VERSION, "i18n" => array (
-                    "coverAlt" => localize("i18n.coversection"),
-                   "authorsTitle" => localize("authors.title"),
-                   "bookwordTitle" => localize("bookword.title"),
-                   "tagsTitle" => localize("tags.title"),
-                   "seriesTitle" => localize("series.title"),
-                   "customizeTitle" => localize ("customize.title"),
-                   "aboutTitle" => localize ("about.title"),
-                   "previousAlt" => localize ("paging.previous.alternate"),
-                   "nextAlt" => localize ("paging.next.alternate"),
-                   "searchAlt" => localize ("search.alternate"),
-                   "sortAlt" => localize ("sort.alternate"),
-                   "homeAlt" => localize ("home.alternate"),
-                   "permalinkAlt" => localize ("permalink.alternate"),
-                   "pubdateTitle" => localize("pubdate.title"),
-                   "languagesTitle" => localize("language.title"),
-                   "contentTitle" => localize("content.summary"),
-                   "sortorderAsc" => localize("search.sortorder.asc"),
-                   "sortorderDesc" => localize("search.sortorder.desc")));
+                       "coverAlt" => localize("i18n.coversection"),
+                       "authorsTitle" => localize("authors.title"),
+                       "bookwordTitle" => localize("bookword.title"),
+                       "tagsTitle" => localize("tags.title"),
+                       "seriesTitle" => localize("series.title"),
+                       "customizeTitle" => localize ("customize.title"),
+                       "aboutTitle" => localize ("about.title"),
+                       "previousAlt" => localize ("paging.previous.alternate"),
+                       "nextAlt" => localize ("paging.next.alternate"),
+                       "searchAlt" => localize ("search.alternate"),
+                       "sortAlt" => localize ("sort.alternate"),
+                       "homeAlt" => localize ("home.alternate"),
+                       "permalinkAlt" => localize ("permalink.alternate"),
+                       "pubdateTitle" => localize("pubdate.title"),
+                       "languagesTitle" => localize("language.title"),
+                       "contentTitle" => localize("content.summary"),
+                       "sortorderAsc" => localize("search.sortorder.asc"),
+                       "sortorderDesc" => localize("search.sortorder.desc")),
+                   "url" => array (
+                   "detailUrl" => "index.php?page=13&id={0}&db={1}",
+                   "coverUrl" => "fetch.php?id={0}&db={1}",
+                   "thumbnailUrl" => "fetch.php?height=70&id={0}&db={1}"));
    }
 
     $out ["containsBook"] = 0;
diff --git a/templates/default/main.html b/templates/default/main.html
index d650241..4476845 100644
--- a/templates/default/main.html
+++ b/templates/default/main.html
@@ -16,7 +16,9 @@
     <article class="books">
             <span class="cover">
             {{? entry.book.hasCover == 1}}
-                <a data-fancybox-group="group" class="fancycover" href="{{=entry.coverurl}}"><img src="{{=entry.thumbnailurl}}" alt="{{=it.const.i18n.coverAlt}}" /></a>
+                <a data-fancybox-group="group" class="fancycover" href="{{=strformat (it.const.url.coverUrl, entry.book.id, it.databaseId)}}">
+                    <img src="{{=strformat (it.const.url.thumbnailUrl, entry.book.id, it.databaseId)}}" alt="{{=it.const.i18n.coverAlt}}" />
+                </a>
             {{?}}
             </span>
             <h2 class="download">
@@ -24,7 +26,7 @@
                  <a href="{{=data.url}}">{{=data.name}}</a><br />
                 {{~}}
             </h2>
-            <a class="fancydetail" href="{{=entry.book.detailUrl}}">
+            <a class="fancydetail" href="{{=strformat (it.const.url.detailUrl, entry.book.id, it.databaseId)}}">
             <div class="fullclickpopup">
                 <h2><span class="st">{{=htmlEscape (entry.title)}}</span>
                 {{? entry.book.pubDate != ""}}<span class="sp">({{=entry.book.pubDate}})</span>{{?}}
diff --git a/util.js b/util.js
index 5ab7e71..f2a8fdb 100644
--- a/util.js
+++ b/util.js
@@ -14,6 +14,15 @@ function fancyBoxObject (title, type) {
     return out;
 }
 
+function strformat () {
+    var s = arguments[0];
+    for (var i = 0; i < arguments.length - 1; i++) {       
+        var reg = new RegExp("\\{" + i + "\\}", "gm");             
+        s = s.replace(reg, arguments[i + 1]);
+    }
+    return s;
+}
+
 function getCurrentOption (option) {
     return $.cookie (option);
 }