// の記述の必要なし
window.onload=HTMLRotation;
function HTMLRotation(){
// バナーの数設定
var banner_num = 7;
var cid = GetCookie("CID");
if(cid == ""){ cid = 1; }
var selectnum = cid % banner_num;
if(selectnum == 0){ selectnum = banner_num; }
var htmls = new Array();
for(var i = 1; i <= banner_num; i++){
htmls[i] = document.getElementById(i).innerHTML;
}
for(j = selectnum, k = 1; j <= banner_num + selectnum, k <= banner_num; j++, k++){
var idname_mod = j;
if(j > banner_num){ idname_mod = j - banner_num; }
document.getElementById(k).innerHTML = htmls[idname_mod];
}
SetCookie("CID", ++cid);
}
function GetCookie(key){
var tmp = document.cookie + ";";
var index1 = tmp.indexOf(key, 0);
if(index1 != -1){
tmp = tmp.substring(index1,tmp.length);
var index2 = tmp.indexOf("=",0) + 1;
var index3 = tmp.indexOf(";",index2);
return(unescape(tmp.substring(index2,index3)));
}
return("");
}
function SetCookie(key, val){
document.cookie = key + "=" + escape(val) + ";expires=Fri, 31-Dec-2030 23:59:59;";
}