function openpage(htmlpage, windowtitle, htmlheight, htmlwidth)
{
 var mysize = 'height=' + htmlheight + ',width=' + htmlwidth;

var windowfeatures = mysize + ',toolbar=yes,status=no,location=no,menubar=no,directories=no,resizable=yes,scrollbars=yes';
 
 window.open(htmlpage,windowtitle,windowfeatures);
}