function GetCookieVal(offset){
  var endstr=document.cookie.indexOf(";",offset);
  if(endstr==-1) {endstr=document.cookie.length;}
  return unescape(document.cookie.substring(offset,endstr));
}
function SetCookie(name,value){
  var expdate=new Date();
  var argv=SetCookie.arguments;
  var argc=SetCookie.arguments.length;
  var expires=(argc>2) ? argv[2] : null;
  var path=(argc>3) ? argv[3] : null;
  var domain=(argc>4) ? argv[4] : null;
  var secure=(argc>5) ? argv[5] : false;
  if(expires!=null) {expdate.setTime(expdate.getTime()+(expires*1000));}
  document.cookie=name+"="+escape(value)+((expires==null) ? "" : ("; expires="+expdate.toGMTString()))
  +((path==null) ? "" : ("; path="+path))+((domain==null) ? "" : ("; domain="+domain))
  +((secure==true) ? "; secure" : "");
}

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;
}