Something

<script type="text/javascript">
function wikibon_showHide(el, switch) {
  var state = document.getElementById(el).style.display;

  if (state == "none") {
    document.getElementById(el).style.display = "block";
  } else {
    document.getElementById(el).style.display = "none";
  }
						
  if (switch != "") {
    var plusMinus = document.getElementById(switch).innerHTML;

    if(plusMinus == "+") {
      document.getElementById(switch).innerHTML = "-";
    } else {
      document.getElementById(switch).innerHTML = "+";
    }
  }
}
</script>