//replacement regular expressions
var expUpToPage = /^.*page/i;
var expAOrB = /(a|b)$/i;
var lessonCompleted = false;
var currentLessonPage;
var popupWindowContents = "";
var popupWin = null;
var isNav = (document.all) ? false: true;
var childRef;

if(parent.frames.lessonFrame != null)
	childRef = eval("parent.frames.lessonFrame");

//Called by User in Lesson Page, used to retrieve the MODULE name to be written to the title area
function txtModuleName()
{
	return objLessonModule.moduleName;
}

//Called by User in Lesson Page, used to retrieve the CopyRight statement
function txtCopyRight()
{
	var theReturn = (copyright != "") ? copyright: " ";
	return theReturn;
}

//Called by User in Lesson Page, used to retrieve the PAGE name to be written to the subtitle area
function txtTitleLabel()
{
	var pageNum = getPageNum();
	var theReturn;
	if(pageNum <= topPage)
		theReturn = (pageNum < objLessonModule.pages.length) ? objLessonModule.pages[pageNum].pageName: "Registration";
	else
		theReturn = "Registration";
	return theReturn;
}

//OBJECT: Lesson Object created by USER in inc_ModuleInfo
function objLesson(txtModuleName)
{
	this.moduleName = txtModuleName;
	this.pages = new Array();
	this.theStatus = "incomplete";
	this.getStatus = checkStatus;
	this.setCurrentPageCompletion = compPage;
	this.addPage = setPage;
	this.isCompleted = false;
}

//OBJECT: Lesson Page Object created by USER in inc_ModuleInfo
function objLessonPage(idxNumber, txtPageName)
{
	this.pageNumber = idxNumber;
	this.pageName = txtPageName;
	this.linkPage = "page" + idxNumber;
	this.isCompleted = false;
	return this;
}

//Called by objLesson(): addPage() method to create a Page
function setPage(idxIndex, txtPageName)
{
	this.pages[this.pages.length] = new objLessonPage(idxIndex, txtPageName);
}

//Called by objLesson(): getStatus(), returns "completed"/"incomplete" depending upon whether or not the Lesson is completed
function checkStatus()
{
	var iterator;
	var theResult = "";
	var theTest = true;
	for(iterator = 0; iterator < this.pages.length; iterator++)
		if(!this.pages[iterator].isCompleted)
			theTest = false;
	this.isCompleted = theTest;
	this.theStatus = (theTest) ? "completed": this.theStatus;
	if(theTest)
		lessonCompleted = true;
	return this.theStatus;
}

//Called by objLesson(): setCurrentPageCompletion(), used to set individual page completion to True
function compPage()
{
	var pageNum = getPageNum();
	if(pageNum < this.pages.length)
		this.pages[pageNum].isCompleted = true;
	return true;
}

//Called by User in Lesson Page, used to write the "page number of pages" images
function writePageInfo()
{
	var txtPageInfo = "&nbsp;";
	var currentPage = getPageNum();
	if((currentPage <= topPage)&&(currentPage > 0))
		txtPageInfo = 'Page ' + currentPage + ' of ' + topPage;
	return(txtPageInfo);
}

//Called by writeLink(), writeOutlineInfo(), showMenu(), txtTitleLabel(), compPage(), writePageInfo(), used to determine current page number
function getPageNum()
{
	var pageNum;
	if(parent.frames.lessonFrame != null)
		pageNum = (expUpToPage.test(parent.frames.lessonFrame.location.href)) ? parseInt(parent.frames.lessonFrame.location.href.replace(expUpToPage, "")): objLessonModule.pages.length;
	else
		pageNum = 0;
	return pageNum;
}

//Called by User in Lesson Page, used to write navigation links
function writeLink(linkDisplay)
{
	var theHREF;
	var pageNum = getPageNum();
	var theDir = linkDisplay.toLowerCase();
	if(theDir == "back")
	{
		if(pageNum > 0)
			theHREF = "<a href=\"./page" + (pageNum - 1) + ".html\" class='titleLink'>Back</a>";
		else
			theHREF = "&nbsp;";
	}else{
		if(pageNum == topPage)
		{
			theHREF = "<a href=\"./finish.html\" class='pageLink'>Next</a>";
		}else{
			if(pageNum < topPage)
				theHREF = "<a href=\"./page" + (pageNum + 1) + ".html\" class='pageLink'>Next</a>";
			else
				theHREF = "&nbsp;";
		}
	}
	return(theHREF);
}

//Called by User in Lesson Page, used to write lesson outline
function writeOutlineInfo()
{
	var theReturn = '';
	var pageNum = getPageNum();
	if(pageNum == 0)
	{
		var thePage;
		var arrReturn = new Array();
		arrReturn[arrReturn.length] = "<b>Contents</b><ul>";
		for(thePage = 0; thePage < objLessonModule.pages.length; thePage++)
			if(thePage == 0)
				arrReturn[arrReturn.length] = objLessonModule.pages[thePage].pageName;
			else
				arrReturn[arrReturn.length] = '<a href="page' + thePage + '.html">' + objLessonModule.pages[thePage].pageName + "</a>";
		theReturn = arrReturn.join("<li>") + "</ul>";
	}
	return theReturn;
}

//Called by User in Lesson Page, used to create and open Menu popupWindow
function showMenu()
{
	closePopup();
	var pageNum = getPageNum();
	var htmlHeader = "<br clear='all'>\n<table width='90%' border=0 cellpadding=4 cellspacing=0 align='center' class='popupTable'>\n<tr>\n" +
		"<td bgcolor='#336699' class='popupTitle'>\n";
	var htmlTween = "</td>\n</tr>\n<tr>\n<td valign='middle'>\n";
	var arrReturn = new Array();
	var thePage;
	for(thePage = 0; thePage < objLessonModule.pages.length; thePage++)
		arrReturn[arrReturn.length] = "<a href=\"#\" onclick=\"opener.childRef.location.href='page" + thePage + ".html';\">" + objLessonModule.pages[thePage].pageName + "</a>";
	var theMenu = arrReturn.join("<br>") + "<br clear='all'>";
	var htmlFooter = "</td></tr><tr><td align='right'><a href='javascript: window.close();'>Close Window</a>&nbsp;</td>\n</tr>\n</table>";
	var theHeight = 90 + ((topPage + 1) * 14);
	if(theHeight > 600)
		theHeight = 600;
	window.popupWindowContents = htmlHeader + "Contents" + htmlTween + theMenu + htmlFooter;
	window.setTimeout("openPopup(400, " + theHeight + ")", 500);
	return true;
}

//Called by <array>.Sort(), used to sort arrays of objects by 'name'
function byName(a, b)
{
	var anew = a.term.toLowerCase();
	var bnew = b.term.toLowerCase();
	if (anew < bnew)
		return -1;
	if (anew > bnew)
		return 1;
	return 0;
}

//Called by showMenu(), showActPopup(), showMainGlossary(), showGlossaryPopup(), used to open the popupWindow
function openPopup(widthVal, heightVal)
{
	var x, y, wdt, hgt;
	wdt = (widthVal) ? widthVal: 340;
	hgt = (heightVal) ? heightVal: 300;
	x = ((window.screen.width - wdt) / 2);
	y = ((window.screen.height - hgt) / 2);
	x = (x < 0) ? 0: x;
	y = (y < 0) ? 0: y;
	window.popupWin = window.open('popupWin.html', 'PopupWindow', 'toolbar=no,status=no,menubar=no,resizable=yes,scrollbars=yes,location=no,top=' + y + ',left=' + x + ',width=' + wdt + ',height=' + hgt);
	window.popupWin.focus();
	return true;
}

//Called by showMenu(), showActPopup(), showMainGlossary(), showGlossaryPopup(), used to close an open popupWindow
function closePopup()
{
	if(window.DefWin == null)
		if(window.opener)
			if(window.opener != null)
				if(window.opener.location != null)
					window.DefWin = window.opener.DefWin;
	if(window.DefWin != null)
		if(window.DefWin.closed)
		{
			window.DefWin = null;
		}else{
			window.DefWin.close();
			window.DefWin = null;
		}
	if(window.DefWin != null)
		window.DefWin = null;
	return true;
}

//Called by writeTermHTML(), used to generate a random link name
function getRandom(low, high)
{
	var range = high - low + 1;
	return Math.floor(Math.random() * range) + low;
}

//Called by User in frame pages, used to indicate that this script has loaded
var isLessonLoaded = true;