It is very simple to add an HTML/JavaScript code in WordPress blog. For add an HTML/JavaScript code in WordPress (like Banner ads, Contextual text ads, or anything your choice) you need to login first and then follow the steps bellow. You can login WordPress blog form here.
Steps to add HTML/JavaScript code in WordPress blogs.
1. After login, go to your Dashboard by simply putting- /wp-admin/ end of your blog address. Exemp- http://xyz.wordpress.com/we-admin/
2. Put your mouse over Appearance tab and click widgets.See the picture..
3. Drag Text (Arbitrary text or HTML) tab into left sidebar.
4. Enter your Text or HTML/JavaScript code into Text tab. And click save button.
This way you can put any HTML/JavaScript Code in WordPress Blogs.
But if you want to add HTML/JavaScript Code into your post then you may follow the steps bellow..
1. click Add New post 2. Here in post section, you will see two potions that is Visual and Text. Click the text option for entering HTML/JavaScript code.
3. past your HTML/JavaScript code on perfect place in your post. You may like-