function confirmDelete(message) {
	// check user agent
	var userAgent = window.navigator.userAgent
	var isIE = userAgent.indexOf('MSIE') != -1;
	var ieVersion = 0;
	if(isIE) {
		var start = userAgent.indexOf('MSIE') + 5;
		ieVersion = parseInt(userAgent.substring(start, start + 1));
	}
	var isIE5 = isIE + ieVersion >= 5;
	
	var result;
	if(isIE5) {
		result = window.showModalDialog('http://www.visible-ink.org/Dialogues/ConfirmDelete.htm', message, 'dialogHeight:150px;dialogWidth:300px;resizable:no;status:no;');
	} else {
		result = confirm(message);
	}
	
	if(result == null) result = false;
	
	return result;
}