// JavaScript Document
var preloadFlag = false;
/*
var currentPage = getCurrentPage();
var pageIndex = 0;
//alert(currentPage);
var pageArray = new Array(4);
pageArray = ["academics.html", "career.htm", "personal.htm", "about.htm"];
var offArray = new Array(4);
offArray = ["pics/navBar_01.jpg", "pics/navBar_02.jpg", "pics/navBar_03/jpg", "pics/navBar_04.jpg"];
var currentArray = new Array(4);
*/
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

function preloadImages() {
	if (document.images) {
		button_01_over = newImage("pics/navBarOn_01.jpg");
		button_02_over = newImage("pics/navBarOn_02.jpg");
		button_03_over = newImage("pics/navBarOn_03.jpg");
		button_04_over = newImage("pics/navBarOn_04.jpg");
		preloadFlag = true;
	}
}


/*
function getCurrentPage(){
	//string manipulations to extract the current file name from the full URL
	var currentPage;
	currentPage = window.location.href;
	var fileStart = currentPage.lastIndexOf("/");
	fileStart++; //need the position after /
	//alert(fileStart);
	var lastCharPos = currentPage.length;
	currentPage = currentPage.slice(fileStart, lastCharPos);
	//alert(currentPage);
	return currentPage;
}

function setCurrentPics()
{
	//set currentArray to offArray
	for(var i = 0; i < offArray.length; i++)
	{
		currentArray[i] = offArray[i];
	}

	//search the pageArray for the current page, 
	//return the corresponding button in picArray
	for(var i=0; i < pageArray.length; i++) 
		{
			if(pageArray[i] == currentPage)
				pageIndex = i;
		}
	//alert("Current page: " + pageIndex);

	var currentArrayString = " ";
	for(var i = 0; i < currentArray.length; i++)
	{
		currentArrayString += currentArray[i] + " ";
	}
	
	//alert(currentArrayString);
	
	var picNumber = pageIndex + 1; //pics are numbered starting at 1
	
	//only put onArray value in pic for current page
	currentArray[pageIndex] = "pics/navBarOn_0" + picNumber + ".jpg";
	
	var newCurrentArrayString  = " ";
	for(var i = 0; i < currentArray.length; i++)
	{
		newCurrentArrayString += currentArray[i] + " ";
	}
	
	//alert(newCurrentArrayString);
}//end setCurrentPics()
*/
function createNavBar(){
	/*setCurrentPics();*/

	document.write("<table align='center'><tr>");
	document.write("<td><a href='academics.html'");
	document.write("onmouseover='changeImages(\"button_01\", \"pics/navBarOn_01.jpg\"); return true;'");
	document.write("onmouseout='changeImages(\"button_01\", \"pics/navBar_01.jpg\"); return true;'");
	document.write("onmousedown='changeImages(\"button_01\", \"pics/navBarOn_01.jpg\"); return true;'");
	document.write("onmouseup='changeImages(\"button_01\", \"pics/navBarOn_01.jpg\"); return true;'>");
	document.write("<img src='pics/navBar_01.jpg' alt='Academics' name='button_01' id='button_01' /></a></td>");
	
	document.write("<td><a href='career.htm'");
	document.write("onmouseover='changeImages(\"button_02\", \"pics/navBarOn_02.jpg\"); return true;'");
	document.write("onmouseout='changeImages(\"button_02\", \"pics/navBar_02.jpg\"); return true;'");
	document.write("onmousedown='changeImages(\"button_02\", \"pics/navBarOn_02.jpg\"); return true;'");
	document.write("onmouseup='changeImages(\"button_02\", \"pics/navBarOn_02.jpg\"); return true;'>");
	document.write("<img src='pics/navBar_02.jpg' alt='Career' name='button_02' id='button_02' /></a></td>");

	document.write("<td><a href='personal.htm'");
	document.write("onmouseover='changeImages(\"button_03\", \"pics/navBarOn_03.jpg\"); return true;'");
	document.write("onmouseout='changeImages(\"button_03\", \"pics/navBar_03.jpg\"); return true;'");
	document.write("onmousedown='changeImages(\"button_03\", \"pics/navBarOn_03.jpg\"); return true;'");
	document.write("onmouseup='changeImages(\"button_03\", \"pics/navBarOn_03.jpg\"); return true;'>");
	document.write("<img src='pics/navBar_03.jpg' alt='Personal' name='button_03' id='button_03' /></a></td>");
	
	document.write("<td><a href='about.htm'");
	document.write("onmouseover='changeImages(\"button_04\", \"pics/navBarOn_04.jpg\"); return true;'");
	document.write("onmouseout='changeImages(\"button_04\", \"pics/navBar_04.jpg\"); return true;'");
	document.write("onmousedown='changeImages(\"button_04\", \"pics/navBarOn_04.jpg\"); return true;'");
	document.write("onmouseup='changeImages(\"button_04\", \"pics/navBarOn_04.jpg\"); return true;'>");
	document.write("<img src='pics/navBar_04.jpg' alt='About' name='button_04' id='button_04' /></a></td>");
	
	/*for(var i=0; i < currentArray.length; i++)
	{
		var correctNumber = i + 1;
		var buttonName = "button_0";
		buttonName = buttonName + correctNumber;
		//alert(pageIndex);
		var currentButton = "";
		currentButton = document.getElementById(buttonName) 
		if(i == pageIndex)
			currentButton.src = currentArray[i];
	}	
	*/
	document.write("</tr></table>");
}