$(document).ready(function(){
	$('.cTopo ul li.sobr').bind("mouseenter",function(){
		$('.cTopo ul li ul').show();
		$('.cTopo ul li.sobr a:first').css('background-position','0 -31px');
	}).bind("mouseleave",function(){
		$('.cTopo ul li ul').hide();
		$('.cTopo ul li.sobr a:first').css('background-position','0 0');
	});
});