// JavaScript Document


	function fn_detecta(){
		
	if(fn_readCookie("topo")!=null) { //existe cookie
		document.getElementById("topo").className = fn_readCookie("topo");
	}
	else { //não existe cookie ou não pode ter
		fn_CriaCookie("topo", "topo");
		document.getElementById("topo").className = 'topo';
		}
	}
	
	function fn_readCookie(nome) {
		var nameEQ = nome + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
	}	
	
	function fn_CriaCookie(nome, valor) {
		var date = new Date();
		date.setTime(date.getTime()+(1000*24*60*60*1000));
		var expira = "; expires="+date.toGMTString();
		document.cookie = nome+"="+valor+expira+";";
	}