function onoff(id,idim) {
  var el = document.getElementById(id);
  var ima = document.getElementById(idim).src;
  el.style.display = (el.style.display=="none") ? "block" : "none";
  //el.style.visible = (el.style.display=="hidden") ? "visible" : "hidden";
  document.getElementById(idim).src = (ima=="http://www.sanco.pt/sysimages/bt_+.gif") ? "http://www.sanco.pt/sysimages/bt_-.gif" : "http://www.sanco.pt/sysimages/bt_+.gif";
}

function verifica_pesquisa(){

var pesq = document.getElementById("T1").value;

if(pesq!=""){
document.getElementById("frm_pesq").submit();
}


}