Whenever you try to insert HTML code in Blogger posts,the blogger removes the code.
Dont worry,there is still a round about way to do it.
In order to insert HTML tags or code in Blogger post, do this..
1>Visit this website http://www.eblogtemplates.com/blogger-ad-code-converter/
2>Paste your HTML code in the box “Paste AD code to convert here” and then click “Convert AD Code”
3>On success,it takes you to another page which has your converted code
4>Copy and paste that code onto your blog post
5>The code may look wierd but on clicking preview,it looks ABSOLUTELY FINE!