function rememberPosition()
{
   SetCookie("Position", self.document.body.scrollTop );
}

function checkForNull()
{
    if( GetCookie("Position") != null )
   checkPosition();
}

// Create a cookie with the specified name and value.
function SetCookie(sName, sValue)
{
date = new Date();
document.cookie = sName + "=" + escape(sValue)
}

// Retrieve the value of the cookie with the specified name.
function GetCookie(sName)
{
// cookies are separated by semicolons
var aCookie = document.cookie.split("; ");
for (var i=0; i < aCookie.length; i++)
{
  // a name/value pair (a crumb) is separated by an equal sign
  var aCrumb = aCookie[i].split("=");
  if (sName == aCrumb[0])
    return unescape(aCrumb[1]);
}

// a cookie with the requested name does not exist
return null;
}