function OpenTrackback (c) {
    window.open(c,
                    'trackback',
                    'width=480,height=480,scrollbars=yes,status=yes');
}

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];
		}
	}
}

var preloadFlag = false;
function preloadimages() {
	if (document.images) {
		menu_about_over = newImage("/images/menu/menu-about-over.gif");
		menu_resume_over = newImage("/images/menu/menu-resume-over.gif");
		menu_portfolio_over = newImage("/images/menu/menu-portfolio-over.gif");
		menu_photos_over = newImage("/images/menu/menu-photos-over.gif");
		menu_fieldnotes_over = newImage("/images/menu/menu-fieldnotes-over.gif");
		preloadFlag = true;
	}
}

{var win= null;
function newwindowfull(url,name,scroll){
  var w = (screen.width-12);
  var h = (screen.height-35);
  var settings  ='height='+h+','; 
      settings +='width='+w+',';
      settings +='top='+0+',';
      settings +='left='+0+',';
      settings +='scrollbars='+scroll+',';
      settings +='resizable=yes';
  win=window.open(url,name,settings);
  if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
 }
};


//Function to "create" center popup"
function newwindow(mypage, myname, w, h, scroll) {
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
win = window.open(mypage, myname, winprops)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

var isDHTML=0;
var isID=0;
var isAll=0;
var isLayers=0;

if (navigator.userAgent.indexOf("Opera") != -1) {
document.write('<link rel="stylesheet" type="text/css" href="style_opera.css">');
}

if (document.getElementById) {isID = 1; isDHTML = 1;}
else
{
	if (document.all) {isAll = 1; isDHTML = 1;}
	else {browserVersion=parseInt(navigator.appVersion);
	      if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion==4)) {isLayers=1; isDHTML=1;}}
}

function toggleIt(name) {
	if (isID) {	var x = document.getElementById(name).style; }
	else 
	{ if (isAll) { var x = document.all[name].style; } 
else
{ if (isLayers) { var x = document.layers[name].style ; }
}
	}

	if (x.display == 'block') x.display = 'none';
	else x.display = 'block';
}