function getFormObject(formName) {
	if (document.getElementById)
		oForm = document.getElementById(formName);
	else if (document.all)
		oForm = document.all[formName]; 
	else if ((navigator.appName.indexOf('Netscape') != -1) && (parseInt(navigator.appVersion) ==4))
			oForm = document.forms[formName];
	return oForm;
}

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

function preloadImages() {
	if (document.images) {
		var but = Array();
		for (i=0; i<preloadImages.arguments.length; i++) {
			but[i] = newImage(preloadImages.arguments[i]);
		}
	}
}

function changeImages() {
	if (document.images) {
		for (i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}