var scriptLoc = '';

if(document.URL.indexOf('https:') > -1)
{
	scriptLoc = 'https://www.sheetmusicdirectaffiliates.com/rep.asp';
}
else
{
	scriptLoc = 'http://www.sheetmusicdirectaffiliates.com/rep.asp';
}

var kbId = 0;
var queryString = window.location.search.substring(1);
var imgdata = '';
var subdata = '';
var overwrite = 0;
	
if(queryString.length > 0)
{
	var pairs = queryString.split('&');

	for(var i = 0; i < pairs.length; i++)
	{
		var pairs2 = pairs[i].split('=');
		
		switch(pairs2[0].toLowerCase())
		{
			case 'kbid':
				kbId = pairs2[1];
				break;

			case 'clearcookie':
				if(pairs2[1] == 1)
				{
					DeleteCookie("kbid");
				}
				break;

			case 'img':
				imgdata = pairs2[1];
				break;

			case 'sub':
				subdata = pairs2[1];
				break;
		}
	}
}

if(GetCookie("kbid") == null || overwrite == 1)
{
	if(kbId != 0)
	{
		var img = new Image();
		var url = scriptLoc + '?id=' + kbId;

		if(imgdata != '')
		{
			url += '&img=' + imgdata
		}

		if(subdata != '')
		{
			url += '&sub=' + subdata
		}

		img.src = url;

		SetCookie("kbid", kbId, 1);
	}
}

function getCookieVal(offset)
{
	var endstr = document.cookie.indexOf (";", offset);

	if(endstr == -1)
		endstr = document.cookie.length;

	return unescape(document.cookie.substring(offset, endstr));
}

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

function DeleteCookie (name) 
{
	var exp = new Date();
	exp.setTime (exp.getTime() - 1000000000);  // This cookie is history (changed -1 to make it previous time)
	var cval = GetCookie (name);
	document.cookie =name + "=" + cval + "; expires=" + exp.toGMTString();
}

function SetCookie(name, value, expiredays)
{
	var expdate = new Date(); 
	expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000 * expiredays)); 
	WriteCookie(name, value, expdate);  
}