function openPage(imageName, w, h) {
    var w, pageStr;

    pageStr = "showHelpImage.aspx?iName=" + imageName + "&w=" + w + "&h=" + h;
    w = window.open(pageStr, "tutorial",
				"width=" + (w + 70) + ",height=" + (h + 70) + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,copyhistory=no,resizable=yes");
    w.focus();
}