Cara Membuat Fungsi Previous dan Next pada Artikel Blog :

1. Login ke dashboard blogger Anda
2. Setelah itu pilih blog yang ingin anda tambahkan widget ini.
3. Masuk ke menu Template >> Edit HTML, dan centang expand widget templates
4. Backup dulu template anda sebelum melakukan editing.
5. Setelah semua langkah diatas anda lakukan, letakkan kode berikut ini diatas kode ]]></b:skin> :
   
   
   #mas-terbaru{border:1px solid #585858;width:100%;margin:0 auto}
   #terbaru{margin:0px}
   .mas-elemen{border:1px solid #ccc;margin:5px 0;padding:5px;height:79px}
   .mas-elemen img{background:#999;padding:4px;float:left;height:70px;margin-right:8px;width:70px}
   .mas-elemen h6,.mas-elemen h6 a{font-size:12px!important;font-weight:700!important;margin:0;color:#111}
   .mas-elemen:hover{background-color:#c3c3c3}
   .mas-elemen p{font:14px PT Sans Narrow;text-align:justify;color:#555;line-height:14px;margin:5px 0}
   #mas-loading{color:#888;font-family:Tahoma;font-size:100px;letter-spacing:-10px;text-align:center;text-shadow:-5px 0 1px #444;background:#141414 url(http://1.bp.blogspot.com/-vBDcLG_CXzU/UBqEMTknKcI/AAAAAAAAIHE/pZTfBZLbPwY/s1600/loading.gif) no-repeat 50% 50%;height:470px;border:1px solid #c3c3c3}
   #mas-navigasifeed{border:1px solid #c3c3c3;color:#bbb;font-family:Verdana;font-size:12px;text-align:center;margin:0px}
   #mas-navigasifeed:hover{background-color:#c3c3c3}
   #mas-navigasifeed a{color:#141414!important;font-family:Tahoma!important;font-size:12px!important;font-weight:400!important;display:block;padding:5px 10px}
   #mas-navigasifeed span{padding:5px 10px}
   #mas-navigasifeed .next{float:right}
   #mas-navigasifeed .previous{float:left}
   #mas-navigasifeed .home{text-align:center}
   #mas-navigasifeed a:hover,#mas-navigasifeed span.noactived{color:transparant!important}
   Perhatikan tulisan warna biru diatas, itu adalah lebar dan tinggi thumbnail image.
6. Selanjutnya masih pada posisi Edit HTML, masukkan kode berikut ini diatas kode </head> :
   
   
   <script type='text/javascript'>
   //<![CDATA[
   var numfeed = 5;
   var startfeed = 0;
   var urlblog = "http://saukanihasan.blogspot.com/";
   var charac = 100;
   var urlprevious, urlnext;
   
   function maskolisfeed(johny,banget){
   var showfeed = johny.split("<");
   for(var i=0;i<showfeed.length;i++){
   if(showfeed[i].indexOf(">")!=-1){
   showfeed[i] = showfeed[i].substring(showfeed[i].indexOf(">")+1,showfeed[i].length);
   }
   }
   showfeed =  showfeed.join("");
   showfeed = showfeed.substring(0,banget-1);
   return showfeed;
   }
   function showterbaru(json) {
   var entry, posttitle, posturl, postimg, postcontent;
   var showblogfeed = "";
   urlprevious = "";
   urlnext = "";
   for (var k = 0; k < json.feed.link.length; k++) {
   if (json.feed.link[k].rel == 'previous') {
   urlprevious = json.feed.link[k].href;
   }
   if (json.feed.link[k].rel == 'next') {
   urlnext = json.feed.link[k].href;
   }
   }
   for (var i = 0; i < numfeed; i++) {
   if (i == json.feed.entry.length) { break; }
   entry = json.feed.entry[i];
   posttitle = entry.title.$t;
   for (var k = 0; k < entry.link.length; k++) {
   if (entry.link[k].rel == 'alternate') {
   posturl = entry.link[k].href;
   break;
   }
   }
   if ("content" in entry) {
   postcontent = entry.content.$t;
   } else if ("summary" in entry) {
   postcontent = entry.summary.$t;
   } else {
   postcontent = "";
   }
   if ("media$thumbnail" in entry) {
   postimg = entry.media$thumbnail.url;
   } else {
   postimg = "http://2.bp.blogspot.com/-uitX7ROPtTU/Tyv-G4NA_uI/AAAAAAAAFBY/NcWLPVnYEnU/s1600/no+image.jpg";
   }
   showblogfeed += "<div class='mas-elemen'>";
   showblogfeed += "<a href='" + posturl + "' target='_blank'><img src='" + postimg + "' /></a>";
   showblogfeed += "<h6><a href='" + posturl + "'>" + posttitle + "</a></h6>";
   showblogfeed += "<p>" + maskolisfeed(postcontent,charac) + "...</p>";
   showblogfeed += "</div>";
   }
   document.getElementById("terbaru").innerHTML = showblogfeed;
   showblogfeed = "";
   if(urlprevious) {
   showblogfeed += "<a href='javascript:navigasifeed(-1);' class='previous'>&#9668; Previous</a>";
   } else {
   showblogfeed += "<span class='noactived previous'>&#9668; Previous</span>";
   }
   if(urlnext) {
   showblogfeed += "<a href='javascript:navigasifeed(1);' class='next'>Next &#9658;</a>";
   } else {
   showblogfeed += "<span class='noactived next'>Next &#9658;</span>";
   }
   showblogfeed += "<a href='javascript:navigasifeed(0);' class='home'>Home</a>";
   document.getElementById("mas-navigasifeed").innerHTML = showblogfeed;
   }
   
   function navigasifeed(url){
   var p, parameter;
   if(url==-1) {
   p = urlprevious.indexOf("?");
   parameter = urlprevious.substring(p);
   } else if (url==1) {
   p = urlnext.indexOf("?");
   parameter = urlnext.substring(p);
   } else {
   parameter = "?start-index=1&max-results=" + numfeed + "&orderby=published&alt=json-in-script"
   }
   parameter += "&callback=showterbaru";
   incluirscript(parameter);
   }
   function incluirscript(parameter) {
   if(startfeed==1) {removerscript();}
   document.getElementById("terbaru").innerHTML = "<div id='mas-loading'></div>";
   document.getElementById("mas-navigasifeed").innerHTML = "";
   var archievefeed = urlblog + "/feeds/posts/default"+ parameter;
   var terbaru = document.createElement('script');
   terbaru.setAttribute('type', 'text/javascript');
   terbaru.setAttribute('src', archievefeed);
   terbaru.setAttribute('id', 'MASLABEL');
   document.getElementsByTagName('head')[0].appendChild(terbaru);
   startfeed = 1;
   }
   function removerscript() {
   var elemen = document.getElementById("MASLABEL");
   var parent = elemen.parentNode;
   parent.removeChild(elemen);
   }
   onload=function() { navigasifeed(0); }
   //]]>
   </script>

   Keterangan :
   var numfeed = 5; >> Jumlah Artikel terbaru yang ditampilkan pada widget
   var urlblog = "http://saukanihasan.blogspot.com/"; >> ganti dengan URL blog Anda
   var charac = 100; >> Jumlah karakter atau huruf pada setiap post.
7. Setelah itu save templates, kemudian menuju ke layout pilih kotak yang akan ditambahkan widget ini. Klik add gadget >> HTML/Javascript masukkan kode berikut ini kedalamnya :
   
   

   <div id="terbaru"></div>
   <div id="mas-navigasifeed"></div>

   Terakhir save dan tadaaaaaaaaaaaaaaaaaaaaa.....lihat hasilnya.