function gravarCookie(){

	var date = new Date();
	date.setTime(date.getTime() + (1*24*60*60*1000));
	var expires = "; expires=" + date.toGMTString();
	
	document.cookie = "Ad=1" + expires + "; path=/";

};

function lerCookie(){
	
	var nameEQ = "Ad=";
	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);
			};
		};
	};
	
};