Insert/Remove rows dynamically in pageblocktable

Many times we come across a scenario where we need to dynamically add new rows to insert new record into the object. Often we try to give pop up to enter new details. However we can also add new empty row dynamically with the help of wrapper classes.

Here is an example which I've developed to overcome above limitation of creating a pop up.

Visualforce Page:

Apex Controller:

Snapshot