$(document).ready(function(){	
	link = $('#nav-main li');
	
	if(!jQuery.browser.msie){
		link.hover(
			function(){$(this).children('a').animate({ 
 				opacity: 0.9,
				backgroundPosition:"(0 -20px)", 

 			}, 500 )},
	
			function(){$(this).children('a').animate({ 
 				opacity: 0.9,
				backgroundPosition:"(0 -20px)", 
 			}, 500 )}
		);
	}	
	
});