function setck(code,str)
{
	var exp=new Date();
	exp.setTime(exp.getTime() + 1000 * 7 * 60 * 60 * 24 );
	document.cookie = code + "=" + str + "; expires=" + exp.toGMTString();
};

function getck(code)
{
	var str = null;
	var ckary = document.cookie.split("; ");
	var i = 0;
	var result = "";
	while (ckary[i])
	{
		str = ckary[i].split('=');
		if (str[0] == code)
		{
			result = str[1];
			break;
		};
		i++;
	};
	return result;
};

function delck(code)
{
	var exp=new Date();
	exp.setYear(exp.getYear() - 1);
	document.cookie = code + "=; expires=" + exp.toGMTString();
};