Paginación para Blogger (Alternativa)

En un post anterior mostraba cómo insertar un sistema de paginación en Blogger, en esta oportunidad traigo una variable igual o mejor de confiable que la anterior, a diferencia de la anterior, ésta contiene botones adicionales.
Vista previa de la paginación:

¿Cómo insertarla en Blogger?

Primero, vamos a ''Diseño/Elementos de la página'' en donde agregamos un gadget ''HTML/Javascript'':

En este gadget, agregaremos el siguiente código:

<style>
.showpageArea {padding: 0 2px;margin-top:10px;margin-bottom:10px;
}
.showpageArea a {border: 1px solid #505050;
 color: #000000;font-weight:normal;
 padding: 3px 6px !important;
 padding: 1px 4px ;margin:0px 4px;
 text-decoration: none;
}
.showpageArea a:hover {
 font-size:11px;
 border: 1px solid #333;
 color: #000000;
 background-color: #FFFFFF;
}
.showpageNum a {border: 1px solid #505050;
 color: #000000;font-weight:normal;
 padding: 3px 6px !important;
 padding: 1px 4px ;margin:0px 4px;
 text-decoration: none;
}
.showpageNum a:hover {
 font-size:11px;
 border: 1px solid #333;
 color: #000000;
 background-color: #FFFFFF;
}
.showpagePoint {font-size:11px;
 padding: 2px 4px 2px 4px;
 margin: 2px;
 font-weight: bold;
 border: 1px solid #333;
 color: #fff;
 background-color: #000000;
}
.showpage a:hover {font-size:11px;
 border: 1px solid #333;
 color: #000000;
 background-color: #FFFFFF;
}
.showpageNum a:link,.showpage a:link {
    font-size:11px;
 padding: 2px 4px 2px 4px;
 margin: 2px;
 text-decoration: none;
 border: 1px solid #0066cc;
 color: #0066cc;
 background-color: #FFFFFF;}
.showpageNum a:hover {font-size:11px;
 border: 1px solid #333;
 color: #000000;
 background-color: #FFFFFF;
}
</style>
<script type="text/javascript">
function showpageCount(json) {
var thisUrl = location.href;
var htmlMap = new Array();
var isFirstPage = thisUrl.substring(thisUrl.length-14,thisUrl.length)==".blogspot.com/";
var isLablePage = thisUrl.indexOf("/search/label/")!=-1;
var isPage = thisUrl.indexOf("/search?updated")!=-1;
var thisLable = isLablePage ? thisUrl.substr(thisUrl.indexOf("/search/label/")+14,thisUrl.length) : "";     
thisLable = thisLable.indexOf("?")!=-1 ? thisLable.substr(0,thisLable.indexOf("?")) : thisLable;
var thisNum = 1;
var postNum=1;
var itemCount = 0;
var fFlag = 0;
var eFlag = 0;
var html= '';
var upPageHtml ='';
var downPageHtml ='';
var pageCount=10;
var displayPageNum=3;
var firstPageWord = 'Inicio';
var endPageWord = 'Última página';
var upPageWord ='Anterior';
var downPageWord ='Siguiente';
var labelHtml = '<span class="showpageNum"><a href="/search/label/'+thisLable+'?&max-results='+pageCount+'">';
for(var i=0, post; post = json.feed.entry[i]; i++) {
var timestamp = post.published.$t.substr(0,10);
var title = post.title.$t;
if(isLablePage){
if(title!=''){
if(post.category){
for(var c=0, post_category; post_category = post.category[c]; c++) {
if(encodeURIComponent(post_category.term)==thisLable){              
if(itemCount==0 || (itemCount % pageCount ==(pageCount-1))){
if(thisUrl.indexOf(timestamp)!=-1 ){
thisNum = postNum;   
}
postNum++;
htmlMap[htmlMap.length] = '/search/label/'+thisLable+'?updated-max='+timestamp+'T00%3A00%3A00%2B08%3A00&max-results='+pageCount;
}               
}       
}
}//end if(post.category){
itemCount++;
}
}else{
if(title!=''){
if(itemCount==0 || (itemCount % pageCount ==(pageCount-1))){
if(thisUrl.indexOf(timestamp)!=-1 ){
thisNum = postNum;
}
if(title!='') postNum++;
htmlMap[htmlMap.length] = '/search?updated-max='+timestamp+'T00%3A00%3A00%2B08%3A00&max-results='+pageCount;
}       
}
itemCount++;
}
}
for(var p =0;p< htmlMap.length;p++){
if(p>=(thisNum-displayPageNum-1) && p<(thisNum+displayPageNum)){
if(fFlag ==0 && p == thisNum-2){
if(thisNum==2){
if(isLablePage){
upPageHtml = labelHtml + upPageWord +'</a></span>';           
}else{
upPageHtml = '<span class="showpage"><a href="/">'+ upPageWord +'</a></span>';
}
}else{
upPageHtml = '<span class="showpage"><a href="'+htmlMap[p]+'">'+ upPageWord +'</a></span>';
}
fFlag++;
}
if(p==(thisNum-1)){
html += '&nbsp;<span class="showpagePoint"><u>'+thisNum+'</u></span>';
}else{
if(p==0){
if(isLablePage){
html = labelHtml+'1</a></span>';  
}else{
html += '<span class="showpageNum"><a href="/">1</a></span>';     
}
}else{
html += '<span class="showpageNum"><a href="'+htmlMap[p]+'">'+ (p+1) +' </a></span>';
}
}
if(eFlag ==0 && p == thisNum){
downPageHtml = '<span class="showpage"> <a href="'+htmlMap[p]+'">'+ downPageWord +'</a></span>';
eFlag++;
}
}//end  if(p>=(thisNum-displayPageNum-1) && p<(thisNum+displayPageNum)){
}//end for(var p =0;p< htmlMap.length;p++){
if(thisNum>1){
if(!isLablePage){
html = '<span class="showpage"><a href="/">'+ firstPageWord +' </a></span>'+upPageHtml+' '+html +' ';
}else{
html = ''+labelHtml + firstPageWord +' </a></span>'+upPageHtml+' '+html +' ';
}
}
html = '<div class="showpageArea"><span style="font-size:11px;padding: 2px 4px 2px 4px;margin: 2px 2px 2px 2px;color: #000000;border: 1px solid #333; background-color: #FFFFFF;" class="showpage">Página '+thisNum+' de '+(postNum-1)+': </span>'+html;
if(thisNum<(postNum-1)){
html += downPageHtml;
html += '<span class="showpage"><a href="'+htmlMap[htmlMap.length-1]+'"> '+endPageWord+'</a></span>';
}
if(postNum==1) postNum++; 
html += '</div>';
if(isPage || isFirstPage || isLablePage){
var pageArea = document.getElementsByName("pageArea");
var blogPager = document.getElementById("blog-pager");
if(postNum <= 2){
html ='';
}
for(var p =0;p< pageArea.length;p++){
pageArea[p].innerHTML = html;
}
if(pageArea&&pageArea.length>0){
html ='';
}
if(blogPager){
blogPager.innerHTML = html;
}
}
}
</script>
<script src="/feeds/posts/summary?alt=json-in-script&callback=showpageCount&max-results=99999" type="text/javascript"></script>

Una vez pegado guardamos los cambios:

 

Situamos el gadget debajo de la zona de las entradas:

Guardamos los cambios y listo.