//Cookie operate
var Cookie = {
	setCookie: function(name, value, expires, path, domain)
	{
		document.cookie = name + "=" + escape(value) +
			((expires) ? "; expires=" + expires.toGMTString() : "") +
			((path) ? "; path=" + path : "; path=/") +
			((domain) ? "; domain=" + domain : "");
	},

	getCookie: function(name)
	{
		var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));

		if (arr != null)
		{
			return unescape(arr[2]);
		
		}

		return null;
	},

	clearCookie: function(name, path, domain)
	{
		if (Cookie.getCookie(name))
		{
			document.cookie = name + "=" +
				((path) ? "; path=" + path : "; path=/") +
				((domain) ? "; domain=" + domain : "") +
				";expires=Fri, 02-Jan-1970 00:00:00 GMT";
		}
	}
};