/*  variables section */

// Simple browser detection (seperate into:  NS4.x, IE4.x, DOCOM[5+] browsers)
var ns = (navigator.appName == 'Netscape');
var gen3 = (parseInt(navigator.appVersion) >= 3 && parseInt(navigator.appVersion) < 4);
var ns4 = (ns && parseInt(navigator.appVersion) >= 4 && parseInt(navigator.appVersion) < 5);
var ie = (navigator.appName == 'Microsoft Internet Explorer');
var ie3 = (ie && navigator.appVersion < 4);
var ie4 = (ie && parseInt(navigator.appVersion) >= 4);
var docom = (document.getElementById);
var win2k = (navigator.userAgent.indexOf('Windows NT 5.0') != -1);
var ie4mac = (ie && !docom && navigator.userAgent.indexOf('Macintosh') != -1);
var dhtmlBrowser = (ie4 || ns4 || docom);
var win31 = (navigator.appVersion.indexOf("Win16") != -1)

var SHOW, HIDE;

if (ie4 || docom) {
  SHOW = "visible";
  HIDE = "hidden";
} else if (ns4) {
  SHOW = "show";
  HIDE = "hide";
}

// Global variables
var path = "";
var winW, winH;
var st;
var zoomWindow = null;

function layerWrite(id,nestref,text) {
	if (ns4) 
	{
	 var lyr = (nestref)? eval('document.'+nestref+'.document.'+id+'.document') : eval('document.' + id + '.document');
	 lyr.open();
	 lyr.write(text);
	 lyr.close();
	}
	else if (ie4) document.all[id].innerHTML = text;
}

function zoom(img, caption, textsrc)
{
  if (zoomWindow) if (!ns) zoomWindow.close();
  zoomWindow = window.open(path+'zoom.html?' + img + '&' + caption + '&' + textsrc, 'zoom', 'top=0,left=50,width=550,height=550,toolbar=0,title=0,location=0,directories=0,status=0,menuBar=0,scrollBars=0,resizable=0');
}

function vizElement(eleId, vizProp)
{
  if (docom) document.getElementById(eleId).style.visibility = vizProp;
  else if (ie4) eval('document.all.' + eleId + '.style.visibility = "' + vizProp + '"');
  else if (ns4) eval('document.' + eleId + '.visibility = "' + vizProp + '"');
}