function swap(j) {
	var teaser = document.getElementById("teaser");
	images = teaser.getElementsByTagName("img");
	
	for (var i = 0; i<images.length; i++) {
		if (i==j-1)
			images[i].style.display = "block";	
		else
			images[i].style.display = "none";	
	}	
}

/*try {
 document.execCommand('BackgroundImageCache', false, true);
} catch(e) {}*/