If you enter any Java Script or HTML code in your posts, Blogger will automatically execute that code considering it a regular part of your post. We just need to encode our HTML special characters like <, >, & into entities <, >, &. This is a really painful process but Beta Templates is here to help you.
1- Go http://www.blogcrowds.com/resources/parse_html.php or to http://www.eblogtemplates.com/blogger-ad-code-converter/ ...