var MacIE=((navigator.appName.indexOf("Explorer")>0)&&(navigator.appVersion.indexOf("Mac")>0));
   var width=MacIE?623:640;
   var height=MacIE?465:480;
   //var windowparams_tutorial = "height=" + height + ",width=" + width;
   var windowparams = "height=" + height + ",width=" + width + ",scrollbars";
   //var windowparams = "height=" + height + ",width=" + width;//