function openwin(URL,NAME,DATA)
{
  newwin = window.open(URL,NAME,DATA);
  newwin.moveTo((screen.availwidth - 600)/2,(screen.availheight - 420)/2);
}

function popup(URL,WIDTH,HEIGHT,LEFT,UP)
{
  popwin = window.open(URL,'popwin','width='+WIDTH+',height='+HEIGHT+',toolbar=0,location=0,directories=0,status=0,menubar=0,resizable=0,scrollbars=yes');
  popwin.moveTo(LEFT,UP);
  //popwin.moveTo((screen.availwidth - WIDTH)/2,(screen.availheight - HEIGHT)/2);
}

function cartina(URL,NAME,DATA)
{
  newwin = window.open(URL,NAME,DATA);
  newwin.moveTo((screen.availwidth - 500)/2,(screen.availheight - 580)/2);
}