// this script implements the survey strategy. After number of pages visited is equal to or

// greater than 'stickFactor' apply the 'samplePercentage' rule to determine if this visitor

// gets the survey.

// Customer : Forbes



// ************* configuration variables - change the values, NOT THE NAMES **************

// minimum number of pages viewed before we survey the user

var stickFactor = 2;// will act as 3



// percentage of visitors to randomly sample

var samplePercentage = 1;



// number of minutes the persistent cookie should last - this prevents a user from

// getting multi-surveyed in this time period 

var resampleWait = 129600; // 90 days



// this variable will override resampleWait in the event that persistent cookies

// are not allowed by the client

var noPersistentCookies = 0;



// this variable when set to 1 will prevent the trigger from performing its

// function

var disableTrigger = 0;



// this is the base URL to the survey engine

var popUpURL = "http://www.foreseeresults.com/survey/display";



// this is our customer's unique customer id

var customerId = "Q8+EG6AmSqT80/hyFPzeDQ==";



// this is out customer's unique model instance id for this survey's model

var modelInstanceId = "3UHqNwcy4zp0zP9UKes28Q==";



// the name of the pop up window

var popUpWinName = "survey";



// if this variable is set to 1,the window pops under rather than up

var popUnder = 1;



// these are the dimensions of the pop up window

var popUpWidth = 410;

var popUpHeight = 500;



// the name of the persistent or session cookie to prevent multi-surveying in a given time period

var ckAlreadyShown = "foreseeSurveyShown";



// the name of the cookie that counts the minimum pages viewed with the trigger code in them

var ckStickyCount = "foreseePagesViewed";



// the name of the cookie that implements the surveying 'sample-percentage' algorithm

var ckSamplePercentage = "foreseeSamplePerc";



// if we are using customer passed parameters, they will be included elsewhere in the page after

// this script is included, overriding the following variable

var customerParams = null;



// ************ don't modify below this line *************

// set persistent cookie expiration if we are using it, otherwise it is a session cookie

var expDate = new Date();

var now = new Date();

var persistentExpires = new Date();

persistentExpires.setTime(persistentExpires.getTime() + (resampleWait*60*1000));



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));

}



// check whether or not this browser supports focus() on windows

function supportsFocus() {

	// get user agent string

	var userAgent = navigator.userAgent;

	// find IE version label in user agent string if it exists

	var realMSVersionAt = userAgent.indexOf("MSIE");



	if (realMSVersionAt == -1) {

		// must be netscape

		return true;

	} else {

		// IE browser, see which one

		var nameAndVersion = userAgent.substring(realMSVersionAt, realMSVersionAt + 6);

		var realMSVersion = nameAndVersion.charAt(5);

		if(realMSVersion >= 5) {

			return true;

		} else {

			return false;

		}

	}

}



// special URL escapes for chars which don't escape using built-in

// escape() function in JavaScript. Currently these are '+', '/', '?', '='

// which are part of the Base64 character set

function specialEscape(s) {

	var encoded = "";

	

	// escape '+' characters

	var tokens = s.split('+');

	for(var i = 0; i < tokens.length; i++) {

		encoded += tokens[i];

		if(i < (tokens.length - 1)) {

			encoded += "%2B"; // %2B is the hex escape for '+'

		}

	}

	

	var t = encoded;

	encoded = "";

	// escape '/' characters

	var tokens = t.split('/');

	for(var i = 0; i < tokens.length; i++) {

		encoded += tokens[i];

		if(i < (tokens.length - 1)) {

			encoded += "%2F"; // %2F is the hex escape for '/'

		}

	}

	

	var t = encoded;

	encoded = "";

	// escape '?' characters

	var tokens = t.split('?');

	for(var i = 0; i < tokens.length; i++) {

		encoded += tokens[i];

		if(i < (tokens.length - 1)) {

			encoded += "%3F"; // %3F is the hex escape for '?'

		}

	}

	

	var t = encoded;

	encoded = "";

	// escape '=' characters

	var tokens = t.split('=');

	for(var i = 0; i < tokens.length; i++) {

		encoded += tokens[i];

		if(i < (tokens.length - 1)) {

			encoded += "%3D"; // %3D is the hex escape for '='

		}

	}

	

	return encoded;

}



function Poll() { // catch onUnload or onLoad event, set in page BODY tag


   if(disableTrigger == 1) {
       return;
   }


   var stickyCounter = GetCookie(ckStickyCount); // check counter cookie
   var alreadyShown = GetCookie(ckAlreadyShown); // check if we already have shown survey
   var pageCount;


   var randNum = Math.random();
   randNum *= 100;
   SetCookie(ckSamplePercentage, randNum); // only for diagnostics


   if (stickyCounter == null) {
       // no cookie, create a new one and set it to 1. We use this to monitor
       // stickiness
       pageCount=1;
       SetCookie(ckStickyCount, pageCount);
   } else {
       // already a cooke - see if we have reached the pages viewed requirement
       pageCount = stickyCounter;
       if(pageCount >= stickFactor) {
           // apply the samplingPercentage algorithm
           if(alreadyShown == null) {
           	// only if we haven't already served them a survey
               if(randNum <= samplePercentage) {
   	    	    var winOptions = "width=" + popUpWidth + ",height=" + popUpHeight + ",resizable=no,scrollbars=yes";
   	    	    var fullURL = popUpURL + "?" + "cid=" + specialEscape(customerId) + "&mid=" + specialEscape(modelInstanceId);
   	    	    if(customerParams != null) {
   	    	        fullURL += customerParams;
   	    	    }
	            var myPopUp = window.open(fullURL, popUpWinName, winOptions);

		    if(supportsFocus()){

			    // handle pop-under functionality

			    if(popUnder == 1) {

				self.focus();

			    } else {

				myPopUp.focus();

			    }

		    }

	            // insure that we only pop up once during the lifetime of the cookie

	            if(noPersistentCookies == 1) {

	            	SetCookie(ckAlreadyShown, 'true',null,'/');

	            } else {

	            	SetCookie(ckAlreadyShown, 'true', persistentExpires,'/');

	            }

	        }

	    }

        }

        // increment it and set the new cookie value    

        pageCount++;

        SetCookie(ckStickyCount, pageCount);

    }





}