function getCookie(byname)
 {
  bynameold=byname;
  byname=byname+"=";
  nlen = byname.length;
  fromN = document.cookie.indexOf(byname)+0;
 
    if((fromN) != -1) 
     {fromN +=nlen 
      toN=document.cookie.indexOf(";",fromN)+0;
        if(toN == -1) 
          {toN=document.cookie.length;} 
        value = unescape(document.cookie.substring(fromN,toN));
				return value;
     } return null;
  }

function setCookie(name,value,time)
 { 
   if((name==null)||(value==null)) return false; 
   name=""+name;
   value=""+value;
   exp = new Date();
   if(time==null) time=365*86400000; 
   exp.setTime(exp.getTime()+time);
   valueold=value;
   nameold=name;

   document.cookie =escape(name)+"="+escape(value)+"; "+"expires="+exp.toGMTString();
   //return true;
 } 
 
function delCookie (NameOfCookie) 
{
  if (getCookie(NameOfCookie)) {
  setCookie(NameOfCookie,'XXX',0);
	}
}