backround, make it transparent-ish? Options

[thats_illegal]

how do you make the backround of the tables KINDA OF transparent. like..its not completely. you know what i mean? is it called opacity, maybe. idk w/e.. thankyou.

[x3_mr_mak]

here is the code

/* Table Section Properties */
table, tr, td {background:transparent; border:0px;}
table table table {background:transparent;}
table table table td {
background-color: B37A44;
filter:alpha(opacity=90); -moz-opacity:0.9; opacity:0.9; -khtml-opacity:0.9;
}