In IE, how do I remove a filter?

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?*/}

Solution 1:

The answer is to set the enabled property of the filter like so:

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

I've only tried this in IE8, but it seems to do the trick:

filter: none;