function toggleTable(el) {
  var myelement = document.getElementById(el);
  var myimg = document.getElementById(el + "-img");
  if( !myelement.style.display || myelement.style.display == "none" ) {
	myelement.style.display = "inline";
    myimg.src= "images/freccia9.gif";
  } else {
    myelement.style.display = "none";
    myimg.src= "images/freccia8.gif";
  }
}

function toggleTable2(el) {
  var myelement = document.getElementById(el);
  var myimg = document.getElementById(el + "-img");
  if( !myelement.style.display || myelement.style.display == "none" ) {
	myelement.style.display = "inline";
  } else {
    myelement.style.display = "none";
  }
}