var onImg = new Array();
var offImg = new Array();
for (var i = 0; i < imageNames.length; i++) {
	refName = imageNames[i];
	imgName = imageDir + refName + ".gif";
	imgHLName = imageDir + refName + "_on.gif";
	onImg[refName] = new Image();
	offImg[refName] = new Image();
	onImg[refName].src = imgHLName;
	offImg[refName].src = imgName;
}
function on(imgName,layerName) {
	if (document.layers&&layerName!=null)  document.layers[layerName].document.images[imgName].src=onImg[imgName].src
	else document[imgName].src = onImg[imgName].src
}
function off(imgName,layerName) {
	if (document.layers&&layerName!=null)  document.layers[layerName].document.images[imgName].src=offImg[imgName].src
	else document[imgName].src = offImg[imgName].src
}
function popup(url, popW, popH) {
	popWidth=popW?popW:400;
	popHeight=popH?popH:400;
	popName=url.substr(0,url.length-5);
	window.open(url, popName, "width="+popWidth+",height="+popHeight+",location=yes,menubar=yes,resizable=yes,scrollbars=yes,status=yes,titlebar=no,toolbar=no")
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}