// 月日で背景を変更する

dd = new Date();
mm = dd.getMonth() + 1;
dd = dd.getDate();
if (mm < 10) { mm = "0" + mm; }
if (dd < 10) { dd = "0" + dd; }
mmdd = "" + mm + "/" + dd ;

bgcss = new Array(
"01/01","02/29","./css/fuyu.css",
"03/01","05/31","./css/haru.css", 
"06/01","08/31","./css/natu.css",
"09/01","11/30","./css/aki.css",
"12/01","12/31","./css/huyu.css");

for (i = 0; i < bgcss.length; i+=3) {
if(bgcss[i]<=mmdd && mmdd<=bgcss[i+1]) {
document.write('<LINK REL="stylesheet" HREF="' + bgcss[i+2] + '" TYPE="text/css">');
}
}