function show(nazwa, width, height)
{
tx=(screen.availWidth-width)/2;
ty=(screen.availHeight-height)/2;
var Win = window.open(nazwa, "",'titlebar=no,toolbar=no,resizable=no,top='+ty+',left='+tx+',scrollbars=no,status=no,menubar=no,width=' + (width + 16)+ ',height=' + (height + 16));
Win.document.write('');
Win.document.write('
');
Win.document.close();
}