Paginación para Blogger Configurable

hoy compartiré un pequeño truco basado en Javascript con estilos CSS, este truco remplaza Entradas antiguas, Entradas más recientes e Inicio por una paginación mucho mejor como en las paginas web profesionales, este truco no solo facilita la navegacion en el blog si no que también le da un toque de elegancia y profesionalismo al blog.

Comenzamos, ve a Diseño-> Edición de HTML y antes de </body> pega lo siguiente:

<!-- PAGE NAVIGATION START-->
<script type='text/javascript'>
var pageCount=7; 
var displayPageNum=10;
var upPageWord =&#39;&#171; &#39;;
var downPageWord =&#39; &#187;&#39;;
</script>
<script type='text/javascript'>
//<![CDATA[
function showpageCount(json){var thisUrl=home_page_url;var htmlMap=new Array();var thisNum=1;var postNum=1;var itemCount=0;var fFlag=0;var eFlag=0;var html='';var upPageHtml='';var downPageHtml='';for(var i=0,post;post=json.feed.entry[i];i++){var timestamp1=post.published.$t.substring(0,19)+post.published.$t.substring(23,29);timestamp=encodeURIComponent(timestamp1);var title=post.title.$t;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+'&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){upPageHtml='<span class="showpage" style="padding: 4px 8px;margin:0 4px;text-decoration:none;background:#dfdfdf;color:#686868; border:1px solid #989898;font-family: Arial, Verdana;font-size: 15px;"><a href="/">'+upPageWord+'</a></span>'}else{upPageHtml='<span class="showpage" style="padding: 4px 8px;margin:0 4px;text-decoration:none;background:#dfdfdf;color:#686868; border:1px solid #989898;font-family: Arial, Verdana;font-size: 15px;"><a href="'+htmlMap[p]+'">'+upPageWord+'</a></span>'}fFlag++}if(p==(thisNum-1)){html+='<span class="showpagePoint">'+thisNum+'</span>'}else{if(p==0){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" style="padding: 4px 8px;margin:0 4px;text-decoration:none;background:#dfdfdf;color:#686868; border:1px solid #989898;font-family: Arial, Verdana;font-size: 15px;"> <a href="'+htmlMap[p]+'">'+downPageWord+'</a></span>';eFlag++}}}if(thisNum>1){html=''+upPageHtml+' '+html+' '}html='<div class="showpageArea"><span style="COLOR: #676767;background:#fff;border: 1px solid #b6b5b5;font-size: 15px;padding:4px 8px;margin:0 4px;" class="showpageOf"> Páginas '+(postNum-1)+'</span>'+html;if(thisNum<(postNum-1)){html+=downPageHtml}if(postNum==1)postNum++;html+='</div>';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}}function showpageCount2(json){var thisUrl=home_page_url;var htmlMap=new Array();var isLablePage=thisUrl.indexOf("/search/label/")!=-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 labelHtml='<span class="showpageNum"><a href="/search/label/'+thisLable+'?&max-results='+pageCount+'">';var thisUrl=home_page_url;for(var i=0,post;post=json.feed.entry[i];i++){var timestamp1=post.published.$t.substring(0,19)+post.published.$t.substring(23,29);timestamp=encodeURIComponent(timestamp1);var title=post.title.$t;if(title!=''){if(itemCount==0||(itemCount%pageCount==(pageCount-1))){if(thisUrl.indexOf(timestamp)!=-1){thisNum=postNum}if(title!='')postNum++;htmlMap[htmlMap.length]='/search/label/'+thisLable+'?updated-max='+timestamp+'&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){upPageHtml=labelHtml+upPageWord+'</a></span>'}else{upPageHtml='<span class="showpage" style="padding: 4px 8px;margin:0 4px;text-decoration:none;background:#dfdfdf;color:#686868; border:1px solid #989898;font-family: Arial, Verdana;font-size: 15px;"><a href="'+htmlMap[p]+'">'+upPageWord+'</a></span>'}fFlag++}if(p==(thisNum-1)){html+='<span class="showpagePoint">'+thisNum+'</span>'}else{if(p==0){html=labelHtml+'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" style="padding: 4px 8px;margin:0 4px;text-decoration:none;background:#dfdfdf;color:#686868; border:1px solid #989898;font-family: Arial, Verdana;font-size: 15px;"> <a href="'+htmlMap[p]+'">'+downPageWord+'</a></span>';eFlag++}}}if(thisNum>1){if(!isLablePage){html=''+upPageHtml+' '+html+' '}else{html=''+upPageHtml+' '+html+' '}}html='<div class="showpageArea"><span style="COLOR: #999;" class="showpageOf"> Páginas ('+(postNum-1)+')</span>'+html;if(thisNum<(postNum-1)){html+=downPageHtml}if(postNum==1)postNum++;html+='</div>';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}}var home_page_url=location.href;var thisUrl=home_page_url;if(thisUrl.indexOf("/search/label/")!=-1){if(thisUrl.indexOf("?updated-max")!=-1){var lblname1=thisUrl.substring(thisUrl.indexOf("/search/label/")+14,thisUrl.indexOf("?updated-max"))}else{var lblname1=thisUrl.substring(thisUrl.indexOf("/search/label/")+14,thisUrl.indexOf("?&max"))}}var home_page="/";if(thisUrl.indexOf("?q=")==-1){if(thisUrl.indexOf("/search/label/")==-1){document.write('<script src="'+home_page+'feeds/posts/summary?alt=json-in-script&callback=showpageCount&max-results=99999" ><\/script>')}else{document.write('<script src="'+home_page+'feeds/posts/full/-/'+lblname1+'?alt=json-in-script&callback=showpageCount2&max-results=99999" ><\/script>')}}
//]]>
</script>
<!-- PAGE NAVIGATION STOP-->

Configuracion:
var pageCount= Indica el numero de entradas a mostrar en cada pagina.
var displayPageNum= Indica la cantidad máxima de números de paginación.

- Ahora pega lo siguiente antes de ]]></b:skin>

/* -- NUMBER PAGE NAVIGATION -- */
.showpageNum a{font:15px Arial,Verdana;padding:4px 8px;margin:0 4px;text-decoration:none;border:0 solid #333;background:#dfdfdf;color:#686868;border:1px solid #989898}
.showpageOf{margin:0 8px 0 0;color:#222;font:15px Arial,Verdana}
.showpageNum a:hover{color:#494949;background:#dfdfdf;border:1px solid #626262}
.showpageArea{margin:10px 0;font:15px Arial,Verdana;color:#111}
.showpagePoint{color:#434343;font:bold 15px Arial,Verdana;padding:4px 8px;margin:2px;border:1px solid #b6b5b5;background:#fff;text-decoration:none}

Guardar cambios y listo, tendrás el truco de paginación para Blogger.