// JavaScript Document

var pages = new Array( "air_rodney.html", 
					  "annual_holiday_concert.html",
					  "clinic_research_day.html",
					  "fall_fest.html", 
					  "fall_step_show.html", 
					  "field_day.html", 
					  "first_robotics.html", 
					  "french_film.html", 
					  "gourney_turney.html", 
					  "greek_week.html", 
					  "homecoming.html", 
					  "intercultural_festival.html", 
					  "match_day.html", 
					  "vcu_ring.html",
					  "rec_sports_field_trips.html", 
					  "strut.html", 
					  "wearable_art.html", 
					  "welcome_week.html", 
					  "white_coat_d.html",
					  "white_coat.html");



function gotoPrev() 
{
	var filename = getCurrentFilename();
	var dest = getFilename(getPageIndex(filename)-1);
	
	if( dest != "") location = dest;
	
}//gotoPrev

function gotoNext()
{
	var filename = getCurrentFilename();
	var dest = getFilename(getPageIndex(filename)+1);
	if(dest != "") location = dest;
}//gotoNext

function getCurrentFilename()
{
	var loc = location.href;
	var slashindex = loc.lastIndexOf("/");
	var filename = loc.substring(slashindex+1);
	return filename;
}//getFilename

function getPageIndex( filename )
{
	var index = -1;
	for(var i=0; i < pages.length; i++ )
	{
		if( pages[i] == filename )
		{
			index = i;
		}//if
	}//for
	
	return index;
}//getPageIndex

function getFilename( pageindex )
{
	if( pageindex < 0 || pageindex >= pages.length )
	{
		return "";
	}
	else
	{
		return pages[pageindex];	
	}
}//getFilename

window.onload = function() {
	var pageindex = getPageIndex(getCurrentFilename());
	if( pageindex == 0 ) document.getElementById("PreviousButton").style.display = "none";
	if( pageindex == pages.length-1) document.getElementById("NextButton").style.display = "none";
}//