//Generic Cookie Routines.

// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = escape(name) + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
  var dc = document.cookie;
  var prefix = escape(name) + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds
function deleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" + 
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"
function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0) {
    date.setTime(date.getTime() - skew);
  }
}

function storeInfo() {
	storeTracking();
	storeREFERRER();  
}

function storeREFERRER() {
	if (getCookie("REFERRERTracker") == null) {
		if (document.referrer) {
			setCookie("REFERRERTracker", document.referrer, "", "", "", false);
		}
	}
}

function getParameter(parameter) {
	if (location.search != "") {
	// key / values pairs are seperated by &
	var params = location.search.substr(1).split("&")        
		for (var i=0; i<params.length; i++) {
			// paramHash[0] will contain the key
			// paramHash[1] will contain the value
			var paramHash = params[i].split("=");
			if (paramHash[0] == parameter) {
				return paramHash[1];
			}
		}
		//We didn't find any parameter with this value
		return null;
	}
}

function storeTracking() {
	var OID = getParameter("OID");
	var bTagId = getParameter("btagid");
	if (OID != null) {
		setCookie("OIDTracker", OID, "", "", "", false);
	}
	if (bTagId != null) {
		//miliseconds * second * minutes * hours * days
		var timeToLive =1000*60*60*24*45;
		var now = new Date().getTime();
		var expirationTime = now + timeToLive;
		var expirationDate = new Date()
		expirationDate.setTime(expirationTime);
		setCookie("BTAGTracker", bTagId, expirationDate, "", "", false);
	}
}