function popup(url)
{
params = 'width='+screen.width;
params += ', height='+screen.height;
params += ', top=0, left=0';
params += ',scrollbars=yes';
params += ',toolbar=yes';
params += ',resizable=yes';
params += ',menubar=yes';
params += ',titlebar=yes';
params += ',status=yes';
params += ',location=yes';

var newwin=window.open(url, 'NewWindow', params );
if (window.focus) {newwin.focus()}
}