/**
 * This script handles the promo code Query/Cookie checking
 * 
 * requires inclusion of {url,querystring,cookie}.js
 */

/**
 * Check whether a value is integer
 * 
 * @param value input value to check 
 * @return boolean true if it matches an integer regex
 */
function isInteger(value) {
	  if (value == null || !value.toString().match(/^\d+$/)) return false;
	  return true;
}

var oQry = new Querystring();
// read query string
var cpid = oQry.get( "CPID", null );
var adv = oQry.get( "adv", null );
var loc = oQry.get( "loc", null );
/*
 * 1) if CPID is present in the querystring of the accessed page, and is numeric, store that along with the lead.
 * eg http://www.gfi.com/app/max/max-trial/?CPID=123 
 */
if (isInteger(cpid)) {
	document.forms.gfimaxform.CPID.value = cpid;
}
/* 
 * 2) Else if the adv and loc are present in the querystring of the accessed page, and are numeric, store those along with the lead.
 * eg http://www.gfi.com/app/max/max-trial/?adv=123&loc=456
 */
else if (isInteger(adv) && isInteger(loc)) {
	document.forms.gfimaxform.adv.value = adv;	
	document.forms.gfimaxform.loc.value = loc;	

} else {
	// read cookies
	cpid = getCookie("CPID");
	adv = getCookie( "adv");
	loc = getCookie( "loc");
	/* 3) Else if the CPID is present in the cookie, and is numeric, store that along with the lead.
	 * eg http://www.gfi.com/app/max/max-trial/ is accessed and CPID=123 is in the cookie
	 */
	if (isInteger(cpid)) {
		document.forms.gfimaxform.CPID.value = cpid;
	}
	/* 4) Else if the adv and loc are present in the cookie, and are numeric, store those along with the lead.
	 * eg http://www.gfi.com/app/max/max-trial/ is accessed and adv=123 and loc=456 are in the cookie
	 */
	else if (isInteger(adv) && isInteger(loc)) {
		document.forms.gfimaxform.adv.value = adv;	
		document.forms.gfimaxform.loc.value = loc;		
	}
}

// debug
// alert(document.forms.gfimaxform.CPID.value + ':' + document.forms.gfimaxform.adv.value + ':' + document.forms.gfimaxform.loc.value);