if(document.images) {

donateoff = new Image();
donateoff.src = "images/button.header.donate.gif";

donateover = new Image();
donateover.src = "images/button.header.donate-over.gif";





headbutton1off = new Image();
headbutton1off.src = "images/button.home.gif";

headbutton1over = new Image();
headbutton1over.src = "images/button.home-over.gif";

headbutton1on = new Image();
headbutton1on.src = "images/button.home-down.gif";


headbutton2off = new Image();
headbutton2off.src = "images/button.about.gif";

headbutton2over = new Image();
headbutton2over.src = "images/button.about-over.gif";

headbutton2on = new Image();
headbutton2on.src = "images/button.about-down.gif";


headbutton3off = new Image();
headbutton3off.src = "images/button.species.gif";

headbutton3over = new Image();
headbutton3over.src = "images/button.species-over.gif";

headbutton3on = new Image();
headbutton3on.src = "images/button.species-down.gif";


headbutton4off = new Image();
headbutton4off.src = "images/button.work.gif";

headbutton4over = new Image();
headbutton4over.src = "images/button.work-over.gif";

headbutton4on = new Image();
headbutton4on.src = "images/button.work-down.gif";






}


function setOn(buttonname) {
top.window.menu = buttonname ;
if (document.images) {
	changeImages("headbutton1","headbutton1off") ;
	changeImages("headbutton2","headbutton2off") ;
	changeImages("headbutton3","headbutton3off") ;
	changeImages("headbutton4","headbutton4off") ;
	hideAll();

	if (buttonname=="headbutton1") {
		top.window.menu="headbutton1" ;
		changeImages("headbutton1","headbutton1on")  ;
		}
	if (buttonname=="headbutton2") {
		top.window.menu="headbutton2" ;
		changeImages("headbutton2","headbutton2on")  ;
		}
	if (buttonname=="headbutton3") {
		top.window.menu="headbutton3" ;
		changeImages("headbutton3","headbutton3on")  ;
		}
	if (buttonname=="headbutton4") {
		top.window.menu="headbutton4" ;
		changeImages("headbutton4","headbutton4on")  ;
		}
	 }
 }

function outCheck(bname) {
if (document.images) {
	hideAll();
	var showLayer = top.window.menu + "Layer";
	
	if (bname=="headbutton1") {
		if (top.window.menu=="headbutton1") changeImages("headbutton1","headbutton1on") ;
		else changeImages("headbutton1","headbutton1off")  ;
		}
	if (bname=="headbutton2") {
		if (top.window.menu=="headbutton2") changeImages("headbutton2","headbutton2on") ;
		else changeImages("headbutton2","headbutton2off")  ;
		}
	if (bname=="headbutton3") {
		if (top.window.menu=="headbutton3") changeImages("headbutton3","headbutton3on") ;
		else changeImages("headbutton3","headbutton3off")  ;
		}
	if (bname=="headbutton4") {
		if (top.window.menu=="headbutton4") changeImages("headbutton4","headbutton4on") ;
		else changeImages("headbutton4","headbutton4off")  ;
		}
	}
}


function overCheck(bname) {
if (document.images) {
	if (bname=="headbutton1") {
		if (top.window.menu=="headbutton1") changeImages("headbutton1","headbutton1on") ;
		else changeImages("headbutton1","headbutton1over"); hideAll(); 
		}
	if (bname=="headbutton2") {
		if (top.window.menu=="headbutton2") changeImages("headbutton2","headbutton2on") ;
		else changeImages("headbutton2","headbutton2over"); hideAll(); MM_showHideLayers('headbutton2Layer','','show');
		}
	if (bname=="headbutton3") {
		if (top.window.menu=="headbutton3") changeImages("headbutton3","headbutton3on") ;
		else changeImages("headbutton3","headbutton3over"); hideAll(); MM_showHideLayers('headbutton3Layer','','show');
		}
	if (bname=="headbutton4") {
		if (top.window.menu=="headbutton4") changeImages("headbutton4","headbutton4on") ;
		else changeImages("headbutton4","headbutton4over"); hideAll(); MM_showHideLayers('headbutton4Layer','','show');
		}
	}
}




function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

var hideDone = "no";

function MM_showHideLayers() { //v6.0
  if(hideDone == "no") {
  	hideAll();
  }
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}


function hideAll()	{
	hideDone="yes"; 
	MM_showHideLayers('headbutton2Layer','','hide');
	MM_showHideLayers('headbutton3Layer','','hide');
	MM_showHideLayers('headbutton4Layer','','hide');
}











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



// email address hider
function emailName(emailFront,emailBack) {
	return emailFront + "@" + emailBack;
}

function sendEmail(emailFront,emailBack) {
	return "<A HREF='mailto:" + emailFront + "@" + emailBack + "'>";
}



//  popup window
var popupwin=0;

function popup() {
	var w=600;
	var h=500;
	var left = (screen.width/2)-(w/2);
	var top = (screen.height/2)-(h/2);
	if(popupwin) { popupwin.close(); }
	popupwin = open('', 'popupwin', 'scrollbars=yes,resizable=yes,width='+w+',height='+h+', top='+top+', left='+left);
}

function popupphotos() {
	var w=700;
	var h=730;
	var left = (screen.width/2)-(w/2);
	var top = (screen.height/2)-(h/2);
	if(popupwin) { popupwin.close(); }
	popupwin = open('', 'popupwin', 'scrollbars=yes,resizable=yes,width='+w+',height='+h+', top='+top+', left='+left);
}

function popupmember() {
	var w=600;
	var h=400;
	var left = (screen.width/2)-(w/2);
	var top = (screen.height/2)-(h/2);
	if(popupwin) { popupwin.close(); }
	popupwin = open('', 'popupwin', 'toolbar=no, location=no, directories=no, status=no, menubar=no,scrollbars=yes,resizable=yes,width='+w+',height='+h+', top='+top+', left='+left);
}