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

	function changeImages(arg1, arg2) {
		if (document.images && (preloadFlag == true)) {
			document.images[arg1].src=arg2;
		}
	}
	var nav = navigator.appName;
	function chengeClass(arg1, arg2)	{
		if (nav == 'Microsoft Internet Explorer')	{
		document.links(arg1).className = arg2;
		} else {
			document.links[arg1].className = arg2;
		}
	}
	var preloadFlag = false;
	function preloadImages() {
		if (document.images) {
			h_50_over = newImage("img/h/h_50_over.jpg");
			h_53_over = newImage("img/h/h_53_over.jpg");
			h_57_over = newImage("img/h/h_57_over.jpg");
			h_61_over = newImage("img/h/h_61_over.jpg");
			h_65_over = newImage("img/h/h_65_over.jpg");
			preloadFlag = true;
		}
	}