var Cookie = {
	setCookie : function(attribute, value, expires){
		var dateExpires = new Date();
		if(expires == null){
			dateExpires.setTime(dateExpires.getTime() + 365 * 24 * 60 * 60 * 1000); //expire dans 1 an
		}else{
			dateExpires.setTime(dateExpires.getTime() + expires * 60 * 60 * 1000);
		}
		expires = dateExpires.toGMTString();
		
		document.cookie = attribute + "=" + encodeURIComponent(value) + "; expires=" + expires + "; path=/";
	},
	
	getCookie : function(attribute){
		attribute += "=";
		var lnAttribute = attribute.length;
		var lnCookie = document.cookie.length;
		
		for(var i = 0; i < lnCookie; ++i){
			var offset = i + lnAttribute;
			if(document.cookie.substring(i, offset) == attribute){
				var end = document.cookie.indexOf(";", offset);
				if(end == -1){
					end = lnCookie;
				}
				return decodeURIComponent(document.cookie.substring(offset, end));
			}
		}
		return null;
	}
};