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) {
		wshop_over = newImage('imgs/wshop-over.jpg');
		wpersonal_over = newImage('imgs/wpersonal-over.jpg');
		wrestaurant_over = newImage('imgs/wrestaurant-over.jpg');
		waccommodation_over = newImage('imgs/waccommodation-over.jpg');
		wcompany_over = newImage('imgs/wcompany-over.gif');
		preloadFlag = true;
		changeImages('wshop', 'imgs/wshop.jpg'); 
		changeImages('wpersonal', 'imgs/wpersonal.jpg'); 
		changeImages('wrestaurant', 'imgs/wrestaurant.jpg'); 
		changeImages('waccommodation', 'imgs/waccommodation.jpg'); 
		changeImages('wcompany', 'imgs/wcompany.gif');
		}
}