function createCookie( name, value, time)
{
  var expires;

  if( time.day == undefined )
  {
    time.day = 0;
  }
  if( time.hour == undefined)
  {
    time.hour = 0;
  }
  if( time.min == undefined)
  {
    time.min = 0;
  }
  if( time.sec == 0)
  {
    time.sec = 0;
  }

  if ( (time.day + time.hour + time.min + time.sec) > 0 )
  {
		var date = new Date();
    var lifeTime = (time.day*24*60*60*1000) + (time.hour*60*60*1000) + (time.min*60*1000) + (time.sec*1000);
		date.setTime(date.getTime()+( lifeTime));
		expires = "; expires="+date.toGMTString();
	}
	else
    expires = "";

  document.cookie = name+"="+value+expires+"; path=/";
}


function readCookie( name)
{
	var nameEq = name + "=";
	var ctb = document.cookie.split(';');
	for(var i=0; i < ctb.length; i++)
  {
		var c = ctb[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEq) == 0)
      return c.substring(nameEq.length,c.length);
	}

	return null;
}


function eraseCookie( name)
{
	createCookie(name,"",-1);
}