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

var offsetfrommouse=[0,0]; //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.


function createTrailObj(){
	var trailImage = document.createElement("div");
	trailImage.setAttribute("id", "trailimageid");
	document.getElementsByTagName("body")[0].appendChild(trailImage);
}

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 glossarykey = "";
var glossarytitle = "";
var glossarydef = "Sorry, your browser does not support the glossary feature on this website.";

/* Fix for Safari! */
if ((navigator.userAgent.indexOf('Safari') != -1))
{
	xmlHttp = new XMLHttpRequest();
	xmlHttp.open("GET", "../include/glossary.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("../include/glossary.xml");
	}
	else
	{
		glossarydef = "Sorry, your browser does not support the glossary feature on this website.";	
	}
	
}



/* PULL THE DEFINITION WHEN CALLED */
function pullDefinition() {
	
	var xmlLength = xmlDoc.getElementsByTagName("term").length;
	
	
	for (var g = 0; g < xmlLength; g++) {
		
		if (xmlDoc.childNodes[0].getElementsByTagName("term")[g].attributes[0].nodeValue == glossarykey)
		{
			glossarytitle = xmlDoc.childNodes[0].getElementsByTagName("term")[g].attributes[1].nodeValue;
			glossarydef = xmlDoc.childNodes[0].getElementsByTagName("term")[g].attributes[2].nodeValue;
			break;
		}
		else
		{
			glossarytitle = "N/A";
			glossarydef = "There is no definition for this term yet.";
		}
	
	}
	
}

/* CONTROL THE GLOSSARY BOX */
// document.onmousemove=followmouse;

function showtrail(term) {
	
	glossarykey = term;
	if (xmlDoc != null) {
		pullDefinition();
	}

	$(document).mousemove(followmouse);
	
	newHTML = '<div id="glossaryDef">'
	
	newHTML += '<b>';
	newHTML += '<div id="glossaryText">' +glossarytitle;
	newHTML += '</b><br>';
	
	newHTML += glossarydef + '</div>';
	
	newHTML += '</div>';

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

}


function hidetrail(){
	gettrailobj().visibility="hidden";

}

function followmouse(e){

	var offset = $("#channel_main").offset();
	if((e.pageX + 240) > (offset.left+599)){
		var xcoords = e.pageX - 240;
	}
	else
	{
		var xcoords = e.pageX;
	}

	ycoords = e.pageY + 15;
gettrailobj().left = xcoords +  "px";
gettrailobj().top = ycoords + "px";

	
}