function load_popup() {
	OpenWindow('popup.php', 'popupEngenho', 617, 550, 1);
}

 function OpenWindow (URL,Name,W,H,Scroll) {
  var WinLeft = (screen.width - W) / 2;
  var WinTop = (screen.height - H) / 2;
  WinProps = 'width='+W+',height='+H+',top='+WinTop+',left='+WinLeft+',scrollbars='+Scroll+',toolbar=0,location=0,directories=0,status=0,menuBar=0,resizable=0';
  Win = window.open(URL,Name,WinProps); 
  if (parseInt(navigator.appVersion) >= 4) {
    Win.window.focus();
  }
}