Mydate=new Date();
mo=Mydate.getMonth()+1;
da=Mydate.getDate();
day=Mydate.getDay();

if((mo == 1) & (da >= 15)){
document.write("<link rel='stylesheet' type='text/css' href=../","011",".css>");
}else if((mo == 2) & (da >= 15)){
document.write("<link rel='stylesheet' type='text/css' href=../","021",".css>");
}else{
document.write("<link rel='stylesheet' type='text/css' href=../",mo,".css>");
}