$(document).ready(function() {
	$('#search_keywords').hover(function(){
	    $(this).css({'background' : 'url(/images/campo_trova_hover.jpg) repeat-x'});	
	}, function() {
	   $(this).css({'background' : 'url(/images/campo_trova.jpg) repeat-x'});
	});
	
	$("ul#topnav li").hover(function() {
		
		$(this).css({ 'background' : 'url(/images/bg_menu_hover.jpg) repeat-x'});
		$(this).find("span").show(); 
	
	} , function() {
		
		$(this).css({ 'background' : 'none'});
		$(this).find("span").hide();
	
	});

});