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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
	l_o = newImage("images/md_o.gif");
	l_b = newImage("images/md_b.gif");
	preloadFlag = true;
	}
}

function SW(a) {
  a.className = "menu_to";
}
function SWR(a) { 
  a.className = "menu_t";
}

//function SW(a) {
//  a.style.backgroundImage = 'url(images/md_o.gif)';
//}
//function SWR(a) { 
//  a.style.backgroundImage = 'url(images/md_b.gif)';
//}