Dynamic Superfish menu options based on browser

[sKunKbad]

I'm trying to pass some options over to the jquery superfish plugin, based on if the browser is IE7 or 8. I've asked elsewhere with no answer, so hoping somebody here can help. In the code below, I want to set animation and speed, but different values if IE7 or 8. Currently it breaks superfish:

 

$(document).ready(function() {
	$('ul.sf-menu').supersubs({
		minWidth:    12,
		maxWidth:    27,
		extraWidth:  1
	}).superfish({
		animation:   (function(){
			if ($.browser.msie && $.browser.version > 6){
				return "{height:'show'}";
			}
			else {
				return "{animation:'show'}";
			}
		}),
		speed:   (function(){
			if ($.browser.msie && $.browser.version > 6){
				return 'fast';
			}
			else {
				return 'normal';
			}
		})
	});
	$('.sf-menu > li a:not(li li a)').css({
		'-moz-border-radius': '3px',
		'-webkit-border-radius': '3px',
		'border-radius': '3px'
	});
});

 

I've been going around in circles with this for an hour or two. Any help is appreciated.