function launchWindow(url, name, width, height) {
    var str = "height=" + height + ",innerHeight=" + height;
    str += ",width=" + width + ",innerWidth=" + width + ", scrollbars=yes";
    if (window.screen) {
	    var ah = screen.availHeight - 30;
	    var aw = screen.availWidth - 10;

	    var xc = (aw - width) / 2;
	    var yc = (ah - height) / 2;

	    str += ",left=" + xc + ",screenX=" + xc;
	    str += ",top=" + yc + ",screenY=" + yc;
    }
    return window.open(url, name, str);
}