1. Log in to your blogger account and Go to Design >> Page Element
2. Click Add Gadget and select 'HTML/Javascript'
3. Paste below one of below code.
<a href="http://www.bloggertrix.com" target="_blank"> <img src="URL" style="opacity:0.4;filter:alpha(opacity=40)" onmouseover="this.style.opacity=1;this.filters.alpha.opacity=100" onmouseout="this.style.opacity=0.4;this.filters.alpha.opacity=40" /> </a>
*Replace with bloggertrix.com with your URL
*Replace with URL with your URL
4. Save HTML/Javascript.
you are done.
( You can use this code for when you making the post.) Good luck!!!