/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact
*/

var offsetfrommouse=[20,-10]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration=0; //duration in seconds image should remain visible. 0 for always.
var currentimageheight = 0;	// maximum image size.

if (document.getElementById || document.all){
	document.write('<div id="trailimageid">');
	document.write('</div>');
}

function gettrailobj(){
if (document.getElementById)
return document.getElementById("trailimageid").style
else if (document.all)
return document.all.trailimageid.style
}

function gettrailobjnostyle(){
if (document.getElementById)
return document.getElementById("trailimageid")
else if (document.all)
return document.all.trailimageid
}


function truebody(){
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}


/* LOAD THE XML FILE */
var xmlHttp;
var xmlDoc;
var referencekey = "";
var referencetitle = "";
var referencedef = "Sorry, your browser does not support the reference feature on this website.";

/* Fix for Safari! */
if ((navigator.userAgent.indexOf('Safari') != -1))
{
	xmlHttp = new XMLHttpRequest();
	xmlHttp.open("GET", "../scripts/references.xml", false);
	xmlHttp.send();
	xmlDoc = xmlHttp.responseXML;
}
else
{

	if (window.ActiveXObject)
	{
		xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
	}
	else if (document.implementation.createDocument)
	{
		xmlDoc = document.implementation.createDocument("","",null);
	}

	if (xmlDoc != null)
	{
		xmlDoc.async = false;
		xmlDoc.load("../scripts/references.xml");
	}
	else
	{
		referencedef = "Sorry, your browser cannot load reference feature on this website.";	
	}
	
}



/* PULL THE DEFINITION WHEN CALLED */
function pullDefinition() {
	
	var xmlLength = xmlDoc.getElementsByTagName("ref").length;
	
	
	for (var g = 0; g < xmlLength; g++) {

		if (xmlDoc.childNodes[0].getElementsByTagName("ref")[g].attributes[0].nodeValue == referencekey)
		{
			referencetitle = xmlDoc.childNodes[0].getElementsByTagName("ref")[g].attributes[1].nodeValue;
			referencedef = xmlDoc.childNodes[0].getElementsByTagName("ref")[g].attributes[2].nodeValue;
			break;
		}
		else
		{
			referencetitle = "N/A";
			referencedef = "There is no listed reference yet.";
		}
	
	}
	
}

/* CONTROL THE REFERENCE BOX */
$(document).ready(function() { document.onmousemove = followmouse; });

function showReference(term) {
	
	referencekey = term;
	if (xmlDoc != null) {
		pullDefinition();
	}
	document.onmousemove=followmouse;
	
	newHTML = '<div id="referenceDef">'
	newHTML += referencedef;
	newHTML += '</div>';

	gettrailobjnostyle().innerHTML = newHTML;
	gettrailobj().visibility="visible";

}


function hideReference(){
	gettrailobj().visibility="hidden"
	document.onmousemove=""
	gettrailobj().left="-500px"

}

function followmouse(e){

	var xcoord=offsetfrommouse[0]
	var ycoord=offsetfrommouse[1]

	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

	/*
	if (document.all){
		gettrailobjnostyle().innerHTML = 'A = ' + truebody().scrollHeight + '<br>B = ' + truebody().clientHeight;
	} else {
		gettrailobjnostyle().innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
	}
	*/

	if (typeof e != "undefined"){
		if (docwidth - e.pageX < 380){
			xcoord = e.pageX - xcoord - 300; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (currentimageheight + 110)){
			ycoord += e.pageY - Math.max(0,(110 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < 380){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - 300; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft+event.clientX
		}
		if (docheight - event.clientY < (currentimageheight + 110)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(110 + currentimageheight + event.clientY - docheight));
		} else {
			ycoord += truebody().scrollTop + event.clientY;
		}
	}

	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
	var docheight=document.all? Math.max(truebody().scrollHeight, truebody().clientHeight) : Math.max(document.body.offsetHeight, window.innerHeight)
		if(ycoord < 0) { ycoord = ycoord*-1; }
	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"

}