IWC Workbook Search.......problem with adverts!

When using the IWC Workbook Search page, I am getting a GOOGLE AD that obscures the middle of the page.

Is anyone else experiencing this and how do I get rid of it?

Yes i have an add as well ,at bottom of the page. There is an x in the top right corner of the add, if you click this you get an option : dont show this add again.