function popup(str,w,h)
{

 winz = window.open(str,'popup','scrollbars=1,resizable=1,width='+w+',height='+h+',status=no,location=no,toolbar=0');
 wr= (screen.width / 2)-(w/2);
 tr= (screen.height / 2)-(h/2);
 winz.moveTo(wr,tr);

}

function stampa() 
{             

  browVer = parseInt(navigator.appVersion);

  if (browVer >= 4)
  { 
    window.print();
  }

  else
  { 
   alert("Your Browser version (ver. "+browVer+") doesn't support this function, try to print the page by click the default print button of your browser !"); 
  }

}