userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		b_exhibits_over = newImage("images/b_exhibits-over.gif");
		b_artist_over = newImage("images/b_artist-over.gif");
		b_news_over = newImage("images/b_news-over.gif");
		b_contact_over = newImage("images/b_contact-over.gif");
		b_links_over = newImage("images/b_links-over.gif");
		h_exhibit_title_over = newImage("images/h_exhibit_title-over.gif");
		b_gallery_over = newImage("images/b_gallery-over.gif");
		b_statement_over = newImage("images/b_statement-over.gif");
		b_background_over = newImage("images/b_background-over.gif");
		b_price_over = newImage("images/b_price-over.gif");
		preloadFlag = true;
	}
}

 function random_imglink(){
  var myimages=new Array()
  myimages[1]="images/sample_home.jpg"
  myimages[2]="images/sample_home2.jpg"
  myimages[3]="images/sample_home3.jpg"


  var ry=Math.floor(Math.random()*myimages.length)

  if (ry==0)
     ry=1
     document.write('<img src="'+myimages[ry]+'" border="0" width="740" height="329" align="center" />')
}