function abrir(dochtml) {
 windowTop = screen.height/2 - 400/2;
 windowLeft = screen.width/2 - 650/2;
 if(navigator.appName == "Netscape") { 
  sec = window.open('websystem/index.php','_blank','scrollbars=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes,copyhistory=no,height='+ screen.height +',width='+ screen.width +',top='+ windowTop +',left='+ windowLeft +'');
  window.sec.focus(); 
 } else { 
  window.open('websystem/index.php','_blank', 'scrollbars=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,copyhistory=no,height='+ screen.height +',width='+ screen.width +',top='+ windowTop +',left='+ windowLeft +'');
 }
}

function maior(codigo,imagem) {
  document.getElementById(codigo).src = imagem; 
 }
 function limpar(codigo, imagem) {
  document.getElementById(codigo).src = imagem;
 }
 
 function key(k) {
  if(event.keyCode==49) {
   alert('Seja bem vindo ao WebSystem v1.0\n\nObs: Desligue seu protetor anti popup.');
   abrir();
   return false;
  } 
 }
 if (document.layers) window.captureEvents(Event.KEYPRESS);
  document.onkeydown=key;