var path = "img/";  // PATH TO IMAGES FOLDER FROM THIS PAGE
var imageSuffix = ".gif"; // SUFFIX FOR THE IMAGE TYPE
var statusText = "";
var ifHi = 1; // CHANGE TO 1 IF IMAGES HAVE ROLLOVERS
var ifOn = 0; // CHANGE TO 1 IF IMAGES HAVE ON STATES
var list = new Array();
var currentImg= "";

function preload(name, statusText, ifHi, ifOn, path, imageSuffix) {

        if (document.images) {
		list[name] = new Object();
		list[name].message = statusText;
		list[name].off = new Image();
		list[name].off.src = path + name + "_off" + imageSuffix;
		if (ifOn == 1) {
						list[name].on = new Image();
						list[name].on.src = path + name + "_on" + imageSuffix;
		}
		
		
						list[name].hi = new Image();
						list[name].hi.src = path + name + "_hi" + imageSuffix;
		}
	

}

preload("nav_conservation","Conservation Organizations", ifHi, ifOn, 'img/' , imageSuffix);
preload("nav_home","Home", ifHi, ifOn, 'img/' , imageSuffix);
preload("nav_action_alerts","Action Alerts", ifHi, ifOn,'img/' , imageSuffix);
preload("nav_about","About", ifHi, ifOn,'img/' , imageSuffix);

function switchHi(imgName,layer) {


 	if (document.layers && document.images && list[imgName].hi && (currentImg != imgName)  && layer!='null') {
		document.layers[layer].document.images[imgName].src = list[imgName].hi.src;
		} else if (document.images && list[imgName].hi && (currentImg != imgName)) {
		document.images[imgName].src = list[imgName].hi.src;
		}

 		window.status = list[imgName].message;
		
 	

	}

function switchOff(imgName,layer) {

		
		if (document.layers && document.images && (currentImg != imgName)  && layer!='null') {
			document.layers[layer].document.images[imgName].src = list[imgName].off.src;
		} else if (document.images && list[imgName].hi && (currentImg != imgName)) {

 		document.images[imgName].src = list[imgName].off.src;

        }
		window.status = "";
		window.alert = "working";


}

function switchOn(imgName) {

        if (document.images && list[imgName].on) {
			document.images[imgName].src = list[imgName].on.src;
	}
	currentImg = imgName;

}


var screenHeight = screen.height;

var screenWidth = screen.width;


var pictureWin

function openWin(x,y,z) {
var winHeight = y;

var winWidth = z;

var winTop = (screenHeight/2) - (winHeight/2); 

var winLeft = (screenWidth/2) - (winWidth/2);

if ((pictureWin != null) && (pictureWin.open)) {
	pictureWin.close();
}

pictureWin = open(x,'pictureWin','height='+winHeight+',width='+winWidth+',directories=yes,location=yes,menubar=yes,scrollbars=yes,status=no,toolbar=yes,resizable=yes,top='+winTop+',left='+winLeft)
}