/*
 * This script extracts Google Analytics cookie information
 *	and stores it in a form's hidden field.
 *	
 *	Created by: Epikone
 *	Adapted by: Adviso 
 */

function _uGC(l,n,s) {
 if (!l || l=="" || !n || n=="" || !s || s=="") return "-";
 var i,i2,i3,c="-";
 i=l.indexOf(n);
 i3=n.indexOf("=")+1;
 if (i > -1) {
  i2=l.indexOf(s,i); if (i2 < 0) { i2=l.length; }
  c=l.substring((i+i3),i2);
 }
 return c;
}

function extractGaCookie(f) {
	// 
	// Get the __utmz cookie value. This is the cookie that 
	// stores all campaign information. 
	// 
	var z = _uGC(document.cookie, '__utmz=', ';'); 
	// 
	// The cookie has a number of name-value pairs. 
	// Each identifies an aspect of the campaign. 
	// 
	// utmcsr  = campaign source 
	// utmcmd  = campaign medium 
	// utmctr  = campaign term (keyword) 
	// utmcct  = campaign content (used for A/B testing) 
	// utmccn  = campaign name 
	// utmgclid = unique identifier used when AdWords auto tagging is enabled 
	// 
	// This is very basic code. It separates the campaign-tracking cookie 
	// and populates a variable with each piece of campaign info. 
	// 
	var source  = _uGC(z, 'utmcsr=', '|'); 
	var medium  = _uGC(z, 'utmcmd=', '|'); 
	var term    = _uGC(z, 'utmctr=', '|'); 
	var content = _uGC(z, 'utmcct=', '|'); 
	var campaign = _uGC(z, 'utmccn=', '|'); 
	var gclid   = _uGC(z, 'utmgclid=', '|'); 
	// 
	// The gclid is ONLY present when auto tagging has been enabled. 
	// All other variables, except the term variable, will be '(not set)'. 
	// Because the gclid is only present for Google AdWords we can 
	// populate some other variables that would normally 
	// be left blank. 
	// 
	if (gclid !="-") { 
		  source = 'google'; 
		  medium = 'cpc'; 
	} 
	// Data from the custom segmentation cookie can also be passed 
	// back to your server via a hidden form field 
	var csegment = _uGC(document.cookie, '__utmv=', ';'); 
	if (csegment != '-') { 
		  var csegmentex = /[1-9]*?\.(.*)/;
		  csegment    = csegment.match(csegmentex); 
		  csegment    = csegment[1]; 
	} else { 
		  csegment = 'not set'; 
	} 
	//
	// One more bonus piece of information.  
	// We're going to extract the number of visits that the visitor
	// has generated.  It's also stored in a cookie, the __utma cookis
	// 
	var a = _uGC(document.cookie, '__utma=', ';');
	var aParts = a.split(".");
	var nVisits = aParts[5];
	var gaCookieInfo = '';
	
	switch(medium){
		case '(none)':
			gaCookieInfo = "direct";
			break;
		case 'referral':
			gaCookieInfo = "referral (" + source + ")";
			break;
		case 'organic':
			gaCookieInfo = source + " (" + medium + ") (" + term + ")";
			break;
		case 'cpc':
			gaCookieInfo = source + " (" + medium + ") (" + term + ")";
			break;		  
		default:		  
			if(medium.indexOf("(not set)") > -1) {
				gaCookieInfo += medium.replace(/\(|\)/gi, "");
			} else if(medium != "-"){ 
				gaCookieInfo += medium; 
			}
			
			if(source != "-"){ gaCookieInfo += " (" + source + ")"; }
			
			if(campaign.indexOf("(not set)") > -1) {
				gaCookieInfo += " " + campaign;
			} else if(campaign != "-"){ 
				gaCookieInfo += " (" + campaign + ")"; 
			}
			
			if(content != "-"){ gaCookieInfo += " (" + content + ")"; }
			if(term != "-"){ gaCookieInfo += " (" + term + ")"; }
	}	
	
	gaCookieInfo += " | " + nVisits + " visit(s)";
	f.gaCookieInfo.value  = gaCookieInfo; 
		
	//alert(f.gaCookieInfo.value);

	return false; 	
}