function openwindow(url) {    var options = 'scrollbars=yes,resizable=yes,status=no,toolbar=no,menubar=no,location=no';    options += ',width=' + screen.availWidth + ',height=' + screen.availHeight;    options += ',screenX=0,screenY=0,top=0,left=0';    var win = window.open(url, '', options);    win.focus();    win.moveTo(0, 0);
}