Ads in mid of Blogger posts automatically

Ads in mid of Blogger posts

<!-- Ads in mid of post: automatically -->
<b:if cond='data:blog.pageType == &quot;item&quot;'>
<div expr:id='"atmid" + data:post.id'/>
<div style="clear:both; margin:10px 0;text-align:center">
<!-- Paste Ad code here: Appear at mid of the post -->
</div>
<div expr:id='"attop" + data:post.id'>
<div style="clear:both; margin:10px 0;text-align:center">
<!-- Paste Ad code here: Appear at top of the post -->
</div>
<data:post.body/>
<div style="clear:both; margin:10px 0;text-align:center">
<!-- Paste Ad code here: Appear at bottom of the post -->
</div>
</div>
</b:if>

<script type="text/javascript">
var obj0=document.getElementById("atmid<data:post.id/>");
var obj1=document.getElementById("attop<data:post.id/>");
var s=obj1.innerHTML;
var t=s.substr(0,s.length/2);
var r=t.lastIndexOf(" ");
if(r>0) {obj0.innerHTML=s.substr(0,r);obj1.innerHTML=s.substr(r+1);}
</script>
<!-- Ads in mid of post: automatically -->