Fill Webform From Excel Data

I have to update an online database weekly from data I have in an Excel spreadsheet. At the moment, I am copying and pasting cell by cell into the online form. I have included a picture of what the form looks like. (The form is only available via password protection.)

Each line in my spreadsheet contains the information for one form. I am trying to write code that would fill this form out with the information in each row, submit and then loop to the next row until it reaches an empty cell.