/* 	Referral Functionality 
	This script stores the referring URL passed by either the querystring, 
	or using document.referrer into a cookie.  This is used to track contest
	conversions from third party and internal ads.
*/	



// Set Cookie
function setCookie(c_name,value,expiredays)  {
	var exdate=new Date();exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

// Get Cookie
function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1; 
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    } 
  }
return "";
}

// Returns true if cookie exists
function checkCookie(c_name) {
	cookieValue = getCookie(c_name);
	if (cookieValue!=null && cookieValue!="") {
		return true;
	} else {
		return false;
	}	
}

// Returns selected Query String Variable
function getQueryVariable(variable) { 
  var query = window.location.search.substring(1); 
  var vars = query.split("&"); 
  for (var i=0;i<vars.length;i++) { 
    var pair = vars[i].split("="); 
    if (pair[0] == variable) { 
      return pair[1]; 
    } 
  }
  return false; 
}

// If refer cookie doesn't exist, create it
if (!checkCookie("BMO_TFSA_REFER")) {
	// If refering URL is not passed through query string, use document.referrer
	referURL = (!getQueryVariable("refer"))?document.referrer:getQueryVariable("refer") ;
	setCookie("BMO_TFSA_REFER",referURL)
}


function goToContest() {
	document.location.href = "https://www4.bmo.com/tfsa/mv?action=contest&lang=en&refer="+getCookie("BMO_TFSA_REFER");
}

//alert(getCookie("BMO_TFSA_REFER"));