window.onload = browserCheck;

function browserCheck() {
		var ieTest = navigator.appVersion.indexOf("MSIE 6.")
		if (ieTest >= 0) {
			alert("You are using Internet Explorer 6. This webpage will not be displayed properly. Please upgrade your browser for an improved experience.") 
		}
		else {
			return true;
		}
}

window.onload = rolloverInit;

function rolloverInit() {
	for (var i=0; i<document.images.length; i++) {
		if (document.images[i].parentNode.tagName == "A") {
			setupRollover(document.images[i]);
		}
	}
}

function setupRollover(thisImage) {
	thisImage.outImage = new Image();
	thisImage.outImage.src = thisImage.src;
	thisImage.onmouseout = rollOut;

	thisImage.overImage = new Image();
	thisImage.overImage.src = "images/" + thisImage.id + "hover.gif";
	thisImage.onmouseover = rollOver;	
}

function setupNetscapeRollover(thisImage) {
	thisImage.outImage = new Image();
	thisImage.outImage.src = thisImage.src;
	thisImage.onmouseout = rollOut;

	thisImage.overImage = new Image();
	thisImage.overImage.src = "images/netscape/" + thisImage.id + "hover.gif";
	thisImage.onmouseover = rollOver;	
}

function rollOut() {
	this.src = this.outImage.src;
}

function rollOver() {
	this.src = this.overImage.src;
}