Code tạo phân trang trong blogspot ( đã cải tiến )

<style>
.showpageArea {font-size: 20px; width:500px;background: url(http://thantoc.xm.com/hinh-anh/Pagenavbar-1.jpg) no-repeat left top; padding: 10px; color:#003366;text-align:center;
}
.showpageArea a {
color:#0F0;
text-decoration:underline;
}
.showpageNum a {

text-decoration:none;
color:#0F0; border:1px solid #FFF;
margin:0 10px;
padding:0 5px 0 8px;
}
.showpageNum a:hover {
color:#ffff00; border:1px solid #00ff00;
background-color:#FFF;
}
.showpagePoint {
color:#ffff00;
margin:0 8px 0 4px;
}
.showpage a {
text-decoration:none;
color:#FFF;
padding:0 2px 0 4px;
}
.showpage a:hover {
color:#ffff00;
text-decoration:underline;
} .showpageNum a:link,.showpage a:link {
text-decoration:none;
color:#00ff00;
}
</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=5;
var displayPageNum=2;
var firstPageWord = 'Đầu';
var endPageWord = 'Cuối';
var upPageWord ='&#9668;';
var downPageWord ='&#9658;';



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 >Trang '+thisNum+' / '+(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>