Overriding !important style

Title pretty much sums it up.

The external style sheet has the following code:

td.EvenRow a {
  display: none !important;
}

I have tried using:

element.style.display = "inline";

and

element.style.display = "inline !important";

but neither works. Is it possible to override an !important style using javascript.

This is for a greasemonkey extension, if that makes a difference.