By using the following steps you can insert input elements in your blogspot post dynamically.
Step 1: Start Writting New Post by clicking on the "Create New Post" button
Step 2: Goto HTML view of your post.
Step 3: Add a div where the Input elements are to be added, and give Id to the div. As in my example I have given the Id of the div as "demoDiv". Add another div which will be used to raise click event to add the button. In this demo I have added the div as "insertElementDemo"
