function setCookie(name, value)
{
	var cookie = escape(name) + '=' + escape(value) + "; expires=Fri, 31 Dec 2099 23:59:59 GMT;";
	document.cookie  = cookie;
}

function getCookie(name)
{
	var value = null;
	if(document.cookie)	   //only if exists
	{
		var arr = document.cookie.split((escape(name) + '=')); 
		if(2 <= arr.length)
		{
			var arr2 = arr[1].split(';');
			value = unescape(arr2[0]);
		}
	}
	return value;
}

function deleteCookie(szName)
{
	document.cookie = szName + "=;expires=Thu, 01-Jan-1970 00:00:01 GMT";
}