if (document.getElementById && document.getElementsByTagName){
	var rolloverTarget = document.getElementById("rolloverTarget");
	var defaultContent = rolloverTarget.innerHTML;
	
	var linkTargets = document.getElementById("nav").getElementsByTagName("A");
	var preloader = new Array();
	for (var i=0;i<linkTargets.length;i++) {
		linkTargets[i].onmouseover = switchImage;
		linkTargets[i].onmouseout = restoreImage;
		preloader[i] = new Image();
		preloader[i].src = linkTargets[i].rel;
	}
}

function switchImage() {
	rolloverTarget.innerHTML = "<img src='" + this.rel + "' alt='' />";
}
function restoreImage() {
	rolloverTarget.innerHTML = defaultContent;
}