function strJulian()
{ var dt = new Date()
  var dt0= new Date(dt.getUTCFullYear(),0,1);
  var jd=1+Math.floor((dt.getTime()-dt0.getTime())/1000/60/60/24);
  var st=  "" + dt.getUTCFullYear() + "-" + zPad(jd,3);
  return st;
}

sw1=strJulian();
document.write('<span name="jdate" id="jdate">');
document.write(sw1);
document.write('</span>');