Paginación o numeracíon en tu blog

Buscar: <b:include name='nextprev'/>

Código:


<style type='text/css'>
.blogpager {
font-size:16px;
color: #000000;
font-weight:bold;
padding:0px 4px;
font-family:"Times New Roman", Times, serif;
}
</style>
<div align="center" style="margin:5px;"><form action="#" name="pager20"><span id="vwg-pager-first"></span> <span id="vwg-pager-prev"></span> <input name="showingpage" onfocus="this.select()" value="init..." type="text" size="4" title="Introduce el número de página a la que quieres ir" />/<input size="4" type="text" name="pagestotal" disabled="disabled" value="init..." /> <input type="button" onclick="checkpager()" value="Ir" /> <span id="vwg-pager-next"></span> <span id="vwg-pager-last"></span>
</form></div>
<script type="text/javascript">
var blogID = "XXXXXXXXXXXXXXXXXXXXXXXXXX";
var home_page = "Tu dirección con / al final";
var pager_max_main = 5;
var pager_first_text = "Primera";
var pager_last_text = "Ultima";
var pager_prev_text = "Anterior";
var pager_next_text = "Siguiente";
</script>
<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>