1. Put one form for entering Date, Owner, Phase, Task and Time (min)
2. The "Add" button adds the input as one row to the list table below
3. Below the list table, show the total time in minutes
4. If any field is empty, do not add the row, and show "Some fields are empty" below the form
5. Put the HTML, CSS and JavaScript in one HTML file that works just by opening it in a browser. Name the file worklog.html
