function getCookie(NameOfCookie)
{

if (document.cookie.length > 0) 
{ 


begin = document.cookie.indexOf(NameOfCookie+"="); 
if (begin != -1) { 
	begin += NameOfCookie.length+1; 
	end = document.cookie.indexOf(";", begin);
	if (end == -1) end = document.cookie.length;
	return unescape(document.cookie.substring(begin, end)); } 
}
return null; 

}
function setCookie(NameOfCookie, value, expiredays) {
	var ExpireDate = new Date ();
	ExpireDate.setTime(ExpireDate.getTime() + (expiredays * 24 * 3600 * 1000));
	document.cookie = NameOfCookie + "=" + escape(value) + 
((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());
}
function delCookie (NameOfCookie) {

	if (getCookie(NameOfCookie)) {
		document.cookie = NameOfCookie + "=" + "; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}