doing a quick look at your page and CSS file, without doing any testing.
To get rid of the gray borders, you need to change this line of code
Code:
.table {clear: left; margin: 0.5em 0px 0.2em 30px; border: solid 1px rgb(150,150,150); empty-cells: show; border-collapse: collapse; background-color: rgb(233,232,244);}
and change it to
Code:
.table {clear: left; margin: 0.5em 0px 0.2em 30px; border: none; empty-cells: show; border-collapse: collapse; background-color: rgb(233,232,244);}
This is assuming this is the right table declaration, the border just needs to be set to none instead or solid.
Wesley