var allLoaded = false;
var numImages = 25;

// holds actual images to be swapped
var swapArray = new Array(numImages);

// holds source names of images that are originally in the document
var origArray = new Array(numImages);

function loadImages() {
	for (i = 0; i < numImages; i++) {
		newImg = new Image();
		newImg.src = "images/b-" + (i+1) + "-on.gif";
		swapArray[i] = newImg;
		origArray[i] = "images/b-" + (i+1) + ".gif";
	}
	allLoaded = true;
}

function swapIn(toImg, n) {
	if (allLoaded)	document[toImg].src = swapArray[n].src;
}

function swapOut(toImg, n) {
	if (allLoaded)	document[toImg].src = origArray[n];
}

function handleGlobalSearch() {
	if (document.forms["globalSearchForm"].elements["searchText"].value == "") {
		alert ("Please enter some search text.");
		document.forms["globalSearchForm"].elements["searchText"].focus();
		return false;
	}
	return true;
}

function notifyLogin() {
	alert("Sorry, you must be logged in to add this item to your notification list.\nPlease login, or register if you do not already have an account.");
}