// Mouse tracking software
var proto = '';

if (location.href.match('https:')) { proto = 'https://'; } 
else { proto = 'http://'; } 

var tracksloggingurl = proto + 'www2.studentsreview.com/mousetracks/record.php3';


// detect browser...

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();


// document.write('<iframe id="_mtdata"  name="_mtdata"  style="visibility: hidden; width:0px; height:0px; border: 0px"  src="blank.html"></'+'iframe>');

// alert(BrowserDetect.browser)


////////////
// detect actual screen widths
var screen_x,screen_y;
if (self.innerHeight) // all except Explorer
{
        screen_x = self.innerWidth;
        screen_y = self.innerHeight;
}
else if (document.documentElement && document.documentElement.clientHeight)
        // Explorer 6 Strict Mode
{
        screen_x = document.documentElement.clientWidth;
        screen_y = document.documentElement.clientHeight;
}
else if (document.body) // other Explorers
{
        screen_x = document.body.clientWidth;
        screen_y = document.body.clientHeight;
}

////////////


// setup globals
// Detect if the browser is IE or not.
// If it is not IE, we assume that the browser is NS.
// what about mozilla 3?
var IE = document.all?true:false;

// If NS -- that is, !IE -- then set up for mouse capture
if (BrowserDetect.browser == 'Explorer') 
	{ }
	// firefox/mozilla 2
else if ((BrowserDetect.browser == 'Firefox') && (BrowserDetect.version == 2))
	{ }
else	//mozilla
	{ document.captureEvents(Event.MOUSEMOVE) }





// Temporary variables to hold mouse x-y pos.s
var tempX = 0;
var tempY = 0;

if (typeof(disabletracker) == "undefined") { disabletracker = false; }

if (location.href.match("showtracks")) { disabletracker = true;  }


var mt_date = new Date();
var mt_starttimesecs = mt_date.getTime();

var setonce = 0;

// Set-up to use getMouseXY function onMouseMove
// get position on timer alarm and put into a list of positions.
// allow tracker to be disabled by our showtracker
if (! disabletracker) 
{ 
	if ((BrowserDetect.browser == 'Firefox') && (BrowserDetect.version == 2))
	{ document.addEventListener("mousemove", getMouseXY, false); }
	else { }

	if (document.onmousemove)
	{
		var _omm = document.onmousemove;

		document.onmousemove = function() 
		{
			_omm();
			getMouseXY();
		}
	}
	else
	{ document.onmousemove = getMouseXY; }
}

// positions list
var positions = new Array();



// alert(positions);
// Main function to retrieve mouse x-y pos.s

function getMouseXY(e) {



  if (BrowserDetect.browser == 'Explorer') 
  { // grab the x-y pos.s if browser is IE
    tempX = event.clientX + document.body.scrollLeft;
    tempY = event.clientY + document.body.scrollTop;
  } else {  // grab the x-y pos.s if browser is NS
    tempX = e.pageX;
    tempY = e.pageY;
  }  


/*

	var posx = 0;
	var posy = 0;
	if (!e) var e = window.event;
	if (e.pageX || e.pageY) 	{
		posx = e.pageX;
		posy = e.pageY;
	}
	else if (e.clientX || e.clientY) 	{
		posx = e.clientX + document.body.scrollLeft
			+ document.documentElement.scrollLeft;
		posy = e.clientY + document.body.scrollTop
			+ document.documentElement.scrollTop;
	}
	tempX = posx;
	tempY = posy;

*/


  // catch possible negative values in NS4
  if (tempX < 0){tempX = 0;}
  if (tempY < 0){tempY = 0;}  


// if (location.href.match('columbia'))
// {
//	alert(tempX + " " + tempY);
// }


  positions.push(new Array(tempX,tempY));


  if (! setonce) // only set on first move.
	{ mt_starttimesecs = mt_date.getTime(); setonce = 1; }



	// every lets say 20 mouse moves, we make the record request
	// record takes it all off the stack..



	return true;
}

function showpositions()
{

}


// create the image object before we try to leave the page.
var _mti = new Image();
_mti.src = 'tracksloggingurl';	// lets try to load and resolve the url on page load.
var _mti2 = new Image();

// generate a random data id
var mt_data_id = Math.floor(Math.random()*16777000);


// add page, account
function record_positions()
{


	document.onmousemove = '';

	// don't record if we are in viewing mode...
	if (disabletracker) { return; } 
	if (location.href.match("showtracks")) { return; }

// how long we were moving the mouse on the page.
	var mt_date2 = new Date();
	
	var current_secs = (mt_date2.getTime() - mt_starttimesecs)/1000;

	// alert(current_secs)

	if (current_secs < 0 ) { current_secs = 0.0 ; }




	var params = "location="+location.href+"&data_id="+mt_data_id+"&group="+mt_group+"&account="+mt_account_no+"&revision="+mt_page_revision+"&width="+screen_x+"&height="+screen_y+"&timeonpage="+current_secs+"&positions=";

	var len = 0;
	if (typeof(positions) == "undefined") { }
	else
	{ len = positions.length; }

	for (var i=0; i < len; i++)
	{
		params += positions[i][0] + "." + positions[i][1];
		params += ","
	}

	// max of 2000 in url request.

	// xmlrequests
	if (0) {
		if (typeof XMLHttpRequest != "undefined") {
	       req = new XMLHttpRequest();
		} else if (window.ActiveXObject) {
	       req = new ActiveXObject("Microsoft.XMLHTTP");
		}

	// relative url so http & https work.
	   req.open("POST", tracksloggingurl, true);
	req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	req.setRequestHeader("Content-length", params.length);
	req.setRequestHeader("Connection", "close");
	

	// location.href;
	req.send(params);

	}
	// called as a single image call, has a max of ~250 positions.
	// image request..
	else
	{

		var record_location = tracksloggingurl + "?" + params;

		if (1) // (! _mti.src) 
		{
			// max 250 positions -- allow more than one call eventually...
			_mti.src = record_location;	// if we are http[s], get the right one, so there is no security problem/message.

		}
		else if (! _mti.complete)	// run if the first request didn't complete, try again.
		{
			_mti2.src = record_location;
		}

 if (location.href.match('howto'))
 {
 // alert(record_location)
 }

	}


	// maybe we should try again on the onunload event...


	// the other option is to break up the positions into multiple image url requests...
}



// setup the unload function
if (! disabletracker)
{
	// if an befunload function is already defined...
	if (window.onbeforeunload) 
	{
		var befunloadref = window.onbeforeunload; // window.onunload;

		window.onbeforeunload =  function() { befunloadref(); record_positions(); }

	}
	// no definition, use ours...
	else
	{
		window.onbeforeunload = record_positions;
	}
}


// try again...
// setup the unload function
if (! disabletracker)
{
	// if an unload function is already defined...
	if (window.onunload)
	{
		var unloadref = window.onunload;

		window.onunload =  function() { unloadref(); record_positions(); }
	}
	// no definition, use ours...
	else
	{
		window.onunload = record_positions;
	}
}