var imageOff;
var imageOn;

function initRollovers() {
	if (document.images) {
		imageOff = new Array();
		imageOn = new Array();

		// Start configurable variables
		var imageDirectory = '../images/nav/';

		var imageOffFiles = new Array('background.gif','timeline.gif','resources.gif','pole_figures.gif','village.gif','tools.gif','video.gif','speeches.gif','reading.gif','acknowledgements.gif','map.gif');

		var imageOnFiles = new Array('background_on.gif','timeline_on.gif','resources_on.gif','pole_figures_on.gif','village_on.gif','tools_on.gif','video_on.gif','speeches_on.gif','reading_on.gif','acknowledgements_on.gif','map_on.gif');

		var imageTagNames = new Array('background','timeline','resources','pole_figures','village','tools','video','speeches','reading','acknowledgements','map');
		// End configurable variables
		
		for (var i = 0; i < imageOnFiles.length; i++) {
			currentName = imageTagNames[i];
			imageOff[currentName] = new Image();
			imageOn[currentName] = new Image();
			imageOff[currentName].src = imageDirectory + imageOffFiles[i];
			imageOn[currentName].src = imageDirectory + imageOnFiles[i];
		}
	}
}

function rollon(img, layer) {
	if (document.images && imageOn && imageOn[img]) {
		if (document.layers && layer != null && typeof(layer) == 'object') layer.document.images[img].src = imageOn[img].src;
		else if (document.layers && layer != null && typeof(layer) == 'string') document.layers[layer].document.images[img].src = imageOn[img].src;
		else document.images[img].src = imageOn[img].src;
	}
}

function rolloff(img, layer) {
	if (document.images && imageOff && imageOff[img]) {
		if (document.layers && layer != null && typeof(layer) == 'object') layer.document.images[img].src = imageOff[img].src;
		else if (document.layers && layer != null && typeof(layer) == 'string') document.layers[layer].document.images[img].src = imageOff[img].src;
		else document.images[img].src = imageOff[img].src;
	}
}
ÿ