Table position

Hi

I have at the moment tables positioned by followed:
.....
.tbl {background-color: #b5b979; margin-left: 170px}
.....

I would like them to be centered, no matter what size the screen is. I have tried lots of alternatives, but I think my skills are not enough to solve this. Sure it is something simple, but I just can't figure it out.

Thanks in advance,

If you place the grid insde a DIV, and give that DIV a style "text-align:center" then your grid will be centered as well.