//HEADER BG CSS
var dateObj = new Date();
var checkTime = dateObj.getHours();
if(checkTime>4&&checkTime<16){
  fName = "day";
}else if(checkTime>18 || (checkTime>=0 && checkTime<=4)){
  fName = "night";
}else{
  fName = "evening";
}
document.write("<link rel='stylesheet' href='/common/css/header_"+fName+".css' type='text/css'>");