//get location of last slash
var lastSlash = location.pathname.lastIndexOf('/') + 1
//get length of href minus .html (5 characters)
var locLen = location.pathname.length - 5
//extract current page name minus .html
var currPage = location.pathname.slice(lastSlash, locLen)
//alert(currPage)

//*****************************************************************
//***MODIFY THIS SECTION WHEN USING IN NEW PROJECT*****************
//no dashes allowed in page names - text only
//determine image for current page
switch(currPage) {
case 'index': var currPageImage = 'images/wb57menu_b1'
	break;
case 'guide': var currPageImage = 'images/wb57menu_b2'
	break;
case 'designintegration': var currPageImage = 'images/wb57menu_b3'
	break;
case 'firststeps': var currPageImage = 'images/wb57menu_b3'
	break;
case 'datapackage': var currPageImage = 'images/wb57menu_b3'
	break;
case 'designaids': var currPageImage = 'images/wb57menu_b3'
	break;			
case 'performance': var currPageImage = 'images/wb57menu_b4'
	break;
case 'ellops': var currPageImage = 'images/wb57menu_b5'
	break;
case 'brochure': var currPageImage = 'images/wb57menu_b6'
	break;
case 'missions':	var currPageImage = 'images/wb57menu_b7'
	break;
case 'lifesupport': var currPageImage = 'images/wb57menu_b8'
	break;
case 'history':	var currPageImage = 'images/wb57menu_b9'
	break;
case 'aircraftgallery':	var currPageImage = 'images/wb57menu_b10'
	break;
case 'payloadsgallery':	var currPageImage = 'images/wb57menu_b10'
	break;
case 'personnelgallery':	var currPageImage = 'images/wb57menu_b10'
	break;
case 'in-flightgallery':	var currPageImage = 'images/wb57menu_b10'
	break;
case 'instrumentsandlinks':	var currPageImage = 'images/wb57menu_b11'
	break;
case 'contact':	var currPageImage = 'images/wb57menu_b12'
	break;
case 'sitemap': var currPageImage = 'images/wb57menu_b13'
	break;
default:	var currPageImage = ''
	break;
}
//alert(currPageImage)
//*****************************************************************

var clicked=""
var gtype=".jpg"
var selstate="_over"
if (typeof(loc)=="undefined" || loc==""){
	var loc=""
	if (document.body&&document.body.innerHTML){
		var tt = document.body.innerHTML.toLowerCase();
		var last = tt.indexOf("wb57menu.js\"");
		if (last>0){
			var first = tt.lastIndexOf("\"", last);
			if (first>0 && first<last) loc = document.body.innerHTML.substr(first+1,last-first-1);
		}
	}
}

document.write("<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\"><tr>");
tr(false);
writeButton(loc,"index.html","images/wb57menu_b1",118,19,"WB-57 Home","",0);
writeButton(loc,"guide.html","images/wb57menu_b2",118,19,"WB-57 Users Guide","",0);
writeButton(loc,"designintegration.html","images/wb57menu_b3",118,19,"Design & Integration","",0);
writeButton(loc,"performance.html","images/wb57menu_b4",118,19,"Performance","",0);
writeButton(loc,"ellops.html","images/wb57menu_b5",118,19,"Ellington Facilities","",0);
writeButton(loc,"brochure.html","images/wb57menu_b6",118,19,"WB-57 Brochure","",0);
writeButton(loc,"missions.html","images/wb57menu_b7",118,19,"Missions","",0);
writeButton(loc,"lifesupport.html","images/wb57menu_b8",118,19,"Life Support","",0);
writeButton(loc,"history.html","images/wb57menu_b9",118,19,"WB-57 History","",0);
writeButton(loc,"aircraftgallery.html","images/wb57menu_b10",118,19,"Photo Gallery","",0);
writeButton(loc,"instrumentsandlinks.html","images/wb57menu_b11",118,19,"Links & Instruments","",0);
writeButton(loc,"contact.html","images/wb57menu_b12",118,19,"Contact Page","",0);
writeButton(loc,"sitemap.html","images/wb57menu_b13",118,19,"Sitemap","",0);

//writeButton(loc+"../","sitemap.html","images/wb57menu_b13",118,19,"Sitemap","",0);
tr(true);
document.write("</tr></table>")
loc="";

function tr(b){if (b) document.write("<tr>");else document.write("</tr>");}

function turn_over(name) {
	//alert(name + '='+currPageImage)
	//only switch image if menu item is not current page
	if (name != currPageImage) {
		if (document.images != null && clicked != name) {
			document[name].src = document[name+"_over"].src;
		}
	}
}

function turn_off(name) {
	//alert(name + '='+currPageImage)
	//only switch image if menu item is not current page
	if (name != currPageImage) {
		if (document.images != null && clicked != name) {
			document[name].src = document[name+"_off"].src;
		}
	}
}

function reg(gname,name)
{
if (document.images)
	{
	document[name+"_off"] = new Image();
	document[name+"_off"].src = loc+gname+gtype;
	document[name+"_over"] = new Image();
	document[name+"_over"].src = loc+gname+"_over"+gtype;
	}
}

function evs(name){ return " onmouseover=\"turn_over('"+ name + "')\" onmouseout=\"turn_off('"+ name + "')\""}

function writeButton(urld, url, name, w, h, alt, target, hsp)
{
	gname = name;
	while(typeof(document[name])!="undefined") name += "x";
	reg(gname, name);
	tr(true);
	document.write("<td height = 25 bgcolor = '#417AB1'>");
	if (alt != "") alt = " alt=\"" + alt + "\"";
	if (target != "") target = " target=\"" + target + "\"";
	if (w > 0) w = " width=\""+w+"\""; else w = "";
	if (h > 0) h = " height=\""+h+"\""; else h = "";	
	if (url != "") url = " href=\"" + urld + url + "\"";
	
	document.write("<a " + url + evs(name) + target + ">");	
	
	if (hsp == -1) hsp =" align=\"right\"";
	else if (hsp > 0) hsp = " hspace=\""+hsp+"\"";
	else hsp = "";
	
	if (currPageImage == gname) {
		document.write("<img src=\""+loc+gname+'_over'+gtype+"\" name=\"" + name + "\"" + w + h + alt + hsp + " border=\"0\" /></a></td>");
	}
	else {
		document.write("<img src=\""+loc+gname+gtype+"\" name=\"" + name + "\"" + w + h + alt + hsp + " border=\"0\" /></a></td>");
	}
	tr(false);
}