function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") &&
		anchor.getAttribute("rel") == "external")
		anchor.target = "_blank";
	}
}

function rolloverInit() {
	for (var i=0; i<document.images.length; i++) {
		if (document.images[i].parentNode.tagName == "A" && document.images[i].className == "rollImg") {
			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 = "/imgs/btns/" + thisImage.getAttribute("rel") + "_on.png";
	thisImage.onmouseover = rollOver;	
}

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

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

function startup() {
	externalLinks();
	rolloverInit();
}
window.onload = startup;