/*--------------------------------------------------------------------------*
 *
 * cookie handler script
 * 
 *--------------------------------------------------------------------------*/

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, val)
{
  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(val) +
    ((expires==null) ? "" : ("; expires="+expires.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;
}