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 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;
  document.cookie = name+"="+escape (value) +
    ((expires == null) ? "":("; expires="+expires.toGMTString()))+
    ((path == null) ? "":("; path="+path))+
    ((domain == null) ? "" :("; domain="+domain)) +
    ((secure == true) ? "; secure":"");
  }
  function setcss(cssfile){
    cssname.href=cssfile;
    setcookie("csscookie",cssfile);
  }