Tạo phân trang Paper script 2.0

Bước 1: Tìm dòng <b:include name='nextprev'/>

 <!-- Tạo phân trang Paper script 2.0 -->
  <b:if cond='data:blog.pageType == &quot;index&quot;'>
<style type='text/css'>
.blogpager {
font-size:12px;
color: #060;
font-weight:bold;
padding:0px 2px;
}
</style>
<div align='center' style='margin:5px;'>
<form action='#' name='pager20'>
<span id='vwg-pager-first'/> <span id='vwg-pager-prev'/> <input name='showingpage' onfocus='this.select()' size='4' title='Gõ vào số trang mà bạn muốn đến'; type='text' value='init...'/>/<input disabled='disabled' name='pagestotal' size='4' type='text' value='init...'/> <input onclick='checkpager()' type='button' value='Go'/> <span id='vwg-pager-next'/> <span id='vwg-pager-last'/>
</form>
</div>
<script type='text/javascript'>
var blogID = "2273867814436170597"; // ID blog bạn
var home_page = "http://chiase-vanthuc.blogspot.com"; // Địa chỉ blog bạn
var pager_max_main = 10;  // Số bài hiện trên trang chủ
var pager_first_text = "Đầu trang";
var pager_last_text = "Cuối trang";
var pager_prev_text = "Trang trước";
var pager_next_text = "Trang kế";
<script type='text/javascript'>
//<![CDATA[
var pager_max_results = 20;
if(location.href.match("max-results=")){
 pager_max_results = parseInt(location.href.substring(location.href.indexOf("max-results=")+12).split("&")[0]);
} else if(!location.href.match("/search/label/")){
 pager_max_results = pager_max_main;
}
var per_page = pager_max_results ;
if(!location.href.match('/search/label/')) {
 pager_feedx = "http://www.blogger.com/feeds/"+blogID+"/posts/summary";
 pager_pageurl = home_page+"search";
 }
else {
 label = location.href.split("/")[5];
 label = label.split("?")[0];
 label = label.replace(/ /g,"%20");
 pager_feedx = "http://www.blogger.com/feeds/"+blogID+"/posts/summary/-/"+label;
 pager_pageurl = home_page+"search/label/"+label;
}
var pager_opening = 1;
if(location.href.match("popening=")){
 pager_opening = parseInt(location.href.substring(location.href.indexOf("popening=")+9).split("&")[0]);
}
var num_pages = 1;
function createBlogPager(){
 var script = document.createElement('script');
 script.src = pager_feedx+"?start-index=1&max-results=0&alt=json-in-script&callback=countnumpost";
 script.type = "text/javascript";
 document.getElementsByTagName('head')[0].appendChild(script)
}
function countnumpost(json) {
 var posts  = json.feed.openSearch$totalResults.$t;
 num_pages = (posts%per_page == 0) ? posts/per_page : Math.floor(posts/per_page)+1;
 //////////////////////////////
 var a1 = document.createElement("a");
  a1.className = "blogpager";
  a1.title = "Jump to page: (1)";
  a1.href = "javascript:page(1)";
  a1.innerHTML = pager_first_text;
  document.getElementById("vwg-pager-first").appendChild(a1);
 var a4 = document.createElement("a");
  a4.className = "blogpager";
  a4.title = "Jump to page: ("+num_pages+")";
  a4.href = "javascript:page("+num_pages+")";
  a4.innerHTML = pager_last_text;
  document.getElementById("vwg-pager-last").appendChild(a4);

 var prev = (pager_opening!=1) ? pager_opening-1 : 1;
 var a2 = document.createElement("a");
  a2.className = "blogpager";
  a2.title = "Jump to page: ("+prev+")";
  a2.href = "javascript:page("+prev+")";
  a2.innerHTML = pager_prev_text;
  document.getElementById("vwg-pager-prev").appendChild(a2);

 var next = (pager_opening!=num_pages) ? pager_opening+1 : num_pages;
 var a3 = document.createElement("a");
  a3.className = "blogpager";
  a3.title = "Jump to page: ("+next+")";
  a3.href = "javascript:page("+next+")";
  a3.innerHTML = pager_next_text;
  document.getElementById("vwg-pager-next").appendChild(a3);

 document.pager20.showingpage.value = pager_opening;
 document.pager20.pagestotal.value = num_pages;
}
function checkpager(){
 var uinput = parseInt(document.pager20.showingpage.value);
 if((uinput <= num_pages)&&(uinput >= 1)) {
  page(uinput);
 }
 else {
  alert("Invalid page number. Please try by another!");
  document.pager20.showingpage.focus() ;
  document.pager20.showingpage.select();
 }
}
function getDateAndGo(json){
 var date2 = json.feed.entry[0].published.$t;
 ss = parseFloat(date2.substring(17,19));
 if(ss<59) ss++;
 if(ss<10) { ss = "0"+ ss; }
 date4  = encodeURIComponent(date2.substring(0,17)+ss+date2.substring(23,date2.length));
 location.href = pager_pageurl+'?updated-max='+date4+'&max-results=' + per_page + '&popening=' + pager_opening;
}
function page(startindex) {
 pager_opening = startindex;
 var i = per_page*(startindex-1)+1;
 var script2 = document.createElement("script");
 script2.src =  pager_feedx+"?start-index="+i+"&max-results=1&alt=json-in-script&callback=getDateAndGo";
 document.getElementsByTagName('head')[0].appendChild(script2)
}
createBlogPager();
//]]>
</script>
   </b:if>