In IE, how to remove a filter?

Question

I have a class

.tab{filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#f5ffff', endColorstr='#e8f2f8');}

and when one of the tabs is selected, I want to remove the filter:

 .tab.selectedtab{/*what do I put here to remove the filter?*/} 

Answer 1

The answer is to set the included filter property as follows:

filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);

Answer 2

I only tried this in IE8, but it seems to be a trick:

filter: none;

Answer 3

 -ms-filter: "progid:DXImageTransform.Microsoft.gradient(enabled = false)"; filter: none;