Here’s a nice widget that you may add to your Blogger site which I found. It’s an update that was created by Lasantha Bandara, and this will automatically create a post summary with thumbnail.
Below are the steps:
1. Go to Blogger Dashboard > Template > Edit HTML.
2. Click Expand Widget Templates.
3. Search for </head> tag.
4. Add this code before </head> tag:
<script type='text/javascript'>
summary_noimg = 250;
summary_img = 200;
img_thumb_height = 150;
img_thumb_width = 150;
</script>
<script type='text/javascript'>
//<![CDATA[
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>
Note: You may change the values below with your own
preference:
summary_noimg : number of characters shown when there's no
image.
summary_img : number of characters shown when there's an
image.
img_thumb_height : height of post thumbnails.
img_thumb_width : width of post thumbnails.
5. Look for this <data:post.body/>
6. Replace the code above with this:
<b:if cond='data:blog.pageType !=
"static_page"'>
<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>
</b:if>
</b:if>
<b:if cond='data:blog.pageType ==
"item"'><data:post.body/></b:if>
<b:if cond='data:blog.pageType ==
"static_page"'><data:post.body/></b:if>
<b:if cond='data:blog.pageType !=
"static_page"'>
<b:if cond='data:blog.pageType != "item"'>
<div style='float:right;margin-right:10px;margin-top:5px;'>
<a expr:href='data:post.url'>Read More</a>
</div>
</b:if>
</b:if>
7. Save template
Note: Always perform a backup first before doing any customization on your template.
