function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		yoga_o = newImage("img/yoga_o.jpg");
		yoga_c = newImage("img/yoga_c.jpg");
		health_o = newImage("img/health_o.jpg");
		health_c = newImage("img/health_c.jpg");
		massage_o = newImage("img/massage_o.jpg");
		massage_c = newImage("img/massage_c.jpg");
		events_o = newImage("img/events_o.jpg");
		events_c = newImage("img/events_c.jpg");
		friends_o = newImage("img/friends_o.jpg");
		friends_c = newImage("img/friends_c.jpg");
		us_o = newImage("img/us_o.jpg");
		us_c = newImage("img/us_c.jpg");
		contact_c = newImage("img/contact_c.jpg");
		contact_o = newImage("img/contact_o.jpg");
		training_o = newImage("img/training_o.jpg");
		training_c = newImage("img/training_c.jpg");
		nidra_o = newImage("img/nidra_o.jpg");
		nidra_c = newImage("img/nidra_c.jpg");
		store_o = newImage("img/store_o.jpg");
		store_c = newImage("img/store_c.jpg");
		preloadFlag = true;
	}
}