table row opacity

[ayushchd]

I want to overlay a background image over a table..for that i want to decrease the opacity of the table rows and i do the following:

<tr style="background-color:#ffffff;-moz-opacity: 1.0;opacity:.70;filter: alpha(opacity=40);">

This works well and good with mozilla but not with opera or IE..

does anyone know how to fix this?

[ayushchd]

Anyone with any idea?