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 preloadImagesI() {
	if (document.images) {
		members_over = newImage("images/i/memberso.gif");
		free_tour_over = newImage("images/i/free_touro.gif");
		join_over = newImage("images/i/joino.gif");
		preloadFlag = true;
	}
}
 
function preloadImagesT() {
	if (document.images) {
		members_over = newImage("images/t/memberso.gif");
		free_tour_over = newImage("images/t/free_touro.gif");
		join_over = newImage("images/t/joino.gif");
		preloadFlag = true;
	}
}