//REFERENCE PAGE TAG

//  

// CONSTANTS

var ct = "<img src=";

var cd = "//www.discovercard.com"; //this should contain the domain of the web site

var cu = "/images/zag.gif?Log=1"; //this should contain the full path to the zag.gif file (excluding domain) and include the query string of log=1

var ce = ">";



// Browser Constants

var c = {};

c["sw"] = screen.width;

c["sh"] = screen.height;

c["cd"] = screen.colorDepth;

var co = "";



// Dynamic variables

var d = {};

d["dt"] = document.title;

d["dd"] = window.location.hostname.toString();

d["dl"] = window.location.pathname.toString();

d["dr"] = document.referrer;

d["cb"] = new Date().getTime();

d["qs"] = window.location.search.toString();

var vo = "";



// META DATA Constants (as needed)



// Visual Science specific variables

if (typeof v != "undefined") {

	for ( vKey in v ) {

		vo = vo+"&"+vKey+"="+escape1(v[vKey]);

	}

}



for ( cKey in c ) {

	co = co+"&"+cKey+"="+escape1(c[cKey]);

}



for ( dKey in d ) {

	vo = vo+"&"+dKey+"="+escape2(d[dKey]);

}

//alert (ct + "\n" + cd  + "\n"  +  cu  + "\n" +  vo  + "\n" + co  + "\n" +  ce);

document.write (ct + cd  +  cu  +  vo  + co  +  ce);

//END REFERENCE PAGE TAG





//REFERENCE LINK AND FORM CLICK PAGE TAG

//INITIATE FUNCTIONS ONLOAD

window.onload = startCapture;



function startCapture(){

	

	//TO CAPTURE LINK CLICKS

	if (vlc == "1"){captureLink();}

	

}



//BEGIN LINK CAPTURE PAGE TAG

function captureLink(){

	if (document.links[0]){

	if (document.links){

	var links = document.links, link, k=0;

	while(link=links[k++])	

	link.onclick = captureLinkName;

	}

	}

}

function captureLinkName() {

	var lc=new Image();

	this.parent = this.parentNode;

	lc.src= cd + cu + '&linkname=' + escape1(this.name) + "&cd=" + new Date().getTime();

}



function AppendFormValues()

{

  var formvalues = "";

  for (var i=0;i<document.formname.length;i++)

  {

    var item = document.formname.elements[i];

    var formitem = "v_"+i;

    var formvalue = escape1(item.value);

    formvalues += formitem + '=' + formvalue + '&';

  }

  document.formname.action = document.formname.action + '?' + formvalues;

}





//ESCAPE FUNCTIONS

function escape1(s)

{ return escape(s).replace(/\+/g,"%20") }



function escape2(s)

{ return escape(s).replace(/\+/g, "%2B") }



    

//END LINK CAPTURE PAGE TAG