Step :
1. Login ke Blogger
2. Pilih Template
3. Pilih Edit HTML
4. Centang kotak Expand Template Widget
5. Cari kode </head> dan letakkan kode berikut di atasnya.
<script type='text/javascript'>
var thumbnail_mode = "float" ;
summary_noimg = 150;
summary_img = 150;
img_thumb_height = 100;
img_thumb_width = 120;
</script>
<script type='text/javascript'>
//<![CDATA[
/******************************************
Auto-readmore link script, version 2.0 (for blogspot)
(C)2008 by Anhvo
visit http://en.vietwebguide.com to get more cool hacks
********************************************/
function removeHtmlTag(strx,chop){
if(strx.indexOf("<")!=-1)
{
var s = strx.split("<");
for(var i=0;i<s.length;i++){
if(s[i].indexOf(">")!=-1){
s[i] = s[i].substring(s[i].indexOf(">")+1,s[i].length);
}
}
strx = s.join("");
}
chop = (chop < strx.length-1) ? chop : strx.length-2;
while(strx.charAt(chop-1)!=' ' && strx.indexOf(' ',chop)!=-1) chop++;
strx = strx.substring(0,chop-1);
return strx+'...';
}
function createSummaryAndThumb(pID){
var div = document.getElementById(pID);
var imgtag = "";
var img = div.getElementsByTagName("img");
var summ = summary_noimg;
if(img.length>=1) {
imgtag = '<span style="float:left; padding:0px 10px 5px 0px;"><img src="'+img[0].src+'" width="'+img_thumb_width+'px" height="'+img_thumb_height+'px"/></span>';
summ = summary_img;
}
var summary = imgtag + '<div>' + removeHtmlTag(div.innerHTML,summ) + '</div>';
div.innerHTML = summary;
}
//]]>
</script>
6. Cari kode <data:post.body/> atau <p><data:post.body/></p>. lalu hapus kode tersebut ganti dengan kode berikut
<b:if cond='data:blog.pageType != "item"'>
<div expr:id='"summary" + data:post.id'><data:post.body/></div>
<script type='text/javascript'>createSummaryAndThumb("summary<data:post.id/>");</script>
<span style='float:right'><a expr:href='data:post.url'>Read More..</a></span>
<b:else/>
<data:post.body/>
</b:if>
Untuk read more bergambar berikut kodenya
<b:if cond='data:blog.pageType != "item"'>
<div expr:id='"summary" + data:post.id'><data:post.body/></div>
<script type='text/javascript'>createSummaryAndThumb("summary<data:post.id/>");</script>
<span style='float:right'><a expr:href='data:post.url'><img alt='Read More..' src='http://1.bp.blogspot.com/-IHpf1c0gAZE/TahDsOmCrCI/AAAAAAAAAy0/lOZgwgw7eHg/s1600/pelajaran%2Bblog%2Bread%2Bmore%2Botomatis.jpg'/></a></a></span>
<b:else/>
<data:post.body/>
</b:if>
7. Simpan Tamplate
Note : untuk url yang berwarna Kuning bisa di ganti sesuai keinginan kalian
selamat mencoba
Sumber : http://pelajaran-blog.blogspot.com/2011/04/membuat-read-more-otomatis-auto.html