[jQuery] Remove class from an element x, by clicking on y or z?

[El Magnifico]

Hi,

Although I figured out the part to add/remove class to an element:

$("li.x").click(function(){
var $this = $(this);
if( $this.is('.xshown') ) {
$this.removeClass('xshown');
$this.addClass('xhidden');
}
else {
$this.removeClass('xhidden');
$this.addClass('xshown');
}
return false;
});

...now I just need to know how I can remove the class from say x click
on y or z instead of having to click again on x to remove the class?

Many Thanks.