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) {
		
		fitnessOn = newImage("common/images/fitness_on.gif");
		nutritionOn = newImage("common/images/nutrition_on.gif");
		fashionOn = newImage("common/images/fashion_on.gif");
		interiorOn = newImage("common/images/interior_on.gif");
		getstartedOn = newImage("common/images/getstarted_on.gif");
		aboutusOn = newImage("common/images/about_on.gif");
		preloadFlag = true;
	}
}