function getCookieVal (offset)
{
   var endstr = document.cookie.indexOf (";", offset);
   if (endstr == -1)
	  endstr = document.cookie.length;
   return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name)
{
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
			if (i == 0)
				break;
		}
   return null;
}


function SetCookie (name, value)
{
  var exp = new Date();
  exp.setTime(exp.getTime() + (50*24*60*60*1000));
  expirationDate = exp.toGMTString();


  document.cookie = name + "=" + escape (value) + "; expires=" + expirationDate + "; path=/";

}