var bannerCount;
var expDays = 5;
var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

function getBannerCount() {
	bannerCount = GetCookie('bannerCount');
	if (bannerCount == null) {
		bannerCount = Math.floor(Math.random() * home_photo.length);
		SetCookie('bannerCount', bannerCount, exp);
		return bannerCount;
	}
	else {
	    bannerCount = parseInt(bannerCount);
		bannerCount = bannerCount + 1;
		if (bannerCount > (home_photo.length - 1)) {
		    bannerCount = 0;
		}
		SetCookie('bannerCount', bannerCount, exp);
		return bannerCount;
	}
}

function GetCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	}
	return null;
}

function SetCookie (name, value) {
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	document.cookie = name + "=" + escape (value) +
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	((path == null) ? "" : ("; path=" + path)) +
	((domain == null) ? "" : ("; domain=" + domain)) +
	((secure == true) ? "; secure" : "");
}

function DeleteCookie (name) {
	var exp = new Date();
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

function getCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
		endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

home_photo = new Array(1);
home_photo[0] = "<img border='0' src='/images/home_photo_3.gif' width='230' height='420'>";

bannerCount = getBannerCount();