Here the following operations will be done:
* Styling even rows
* Hovering effect when placing the mouse over a row
* Change the color of a row when clicking on it or on its related checkbox.
* Implementing a "check all" checkbox.
It has only one problem:
* If you first click the "check all" checkbox, the other checkboxes will be checked, but the color of the rows won't change. Unfortunately the "check all" checkbox will only work if you click on a row or on another checkbox