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) {
		NYpic1_over = newImage("images/NYpic1_over.jpg");
		NYpic2_over = newImage("images/NYpic2_over.jpg");
		NYpic3_over = newImage("images/NYpic3_over.jpg");
		NYpic4_over = newImage("images/NYpic4_over.jpg");
		NYpic5_over = newImage("images/NYpic5_over.jpg");
		Vepic1_over = newImage("images/Vepic1_over.jpg");
		Vepic2_over = newImage("images/Vepic2_over.jpg");
		Vepic3_over = newImage("images/Vepic3_over.jpg");
		Vepic4_over = newImage("images/Vepic4_over.jpg");
		Vepic5_over = newImage("images/Vepic5_over.jpg");
		Navigation_main_01_over = newImage("images/Navigation_square_over.gif");
		Artist_navi_square_over = newImage("images/Artist_navi_square_over.gif");
		lanaguage_over = newImage("images/lanaguage_over.gif");
		artist1_pic1_sample_over = newImage("images/artist1_pic1_sample_over.jpg");
		artist1_pic2_sample_over = newImage("images/artist1_pic2_sample_over.jpg");
		artist1_pic3_sample_over = newImage("images/artist1_pic3_sample_over.jpg");
		artist1_pic4_sample_over = newImage("images/artist1_pic4_sample_over.jpg");
		artist1_pic5_sample_over = newImage("images/artist1_pic5_sample_over.jpg");
		artist1_pic1_sample_over = newImage("images/curator_pic1_sample_over.jpg");
		artist1_pic2_sample_over = newImage("images/curator_pic2_sample_over.jpg");
		artist1_pic3_sample_over = newImage("images/curator_pic3_sample_over.jpg");
		artist1_pic4_sample_over = newImage("images/curator_pic4_sample_over.jpg");
		artist1_pic5_sample_over = newImage("images/curator_pic5_sample_over.jpg");
		artist1_pic1_sample_over = newImage("images/museum_pic1_sample_over.jpg");
		artist1_pic2_sample_over = newImage("images/museum_pic2_sample_over.jpg");
		artist1_pic3_sample_over = newImage("images/museum_pic3_sample_over.jpg");
		artist1_pic4_sample_over = newImage("images/museum_pic4_sample_over.jpg");
		artist1_pic5_sample_over = newImage("images/museum_pic5_sample_over.jpg");
		preloadFlag = true;
	}
}

function reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.pgW=innerWidth; document.pgH=innerHeight; onresize=reloadPage; }}
  else if (innerWidth!=document.pgW || innerHeight!=document.pgH) location.reload();
}

function newWin(url) {
window.open(url,'pic','toolbar=no,status=no,scrollbars=no,resizable=yes,menubar=no,width=600,height=600,top=10,left=80');
}

function switchLanguage(langID) {
//extract the filename of page currently loaded
var fileName = location.pathname.substring(location.pathname.lastIndexOf('/')+1);
var url = ("../"+langID+"/"+fileName);
location.href = url;
}