//add event function
function addEvent(obj, evType, fn){
  if (obj.addEventListener){
    obj.addEventListener(evType, fn, true);
    return true;
  }
  else if (obj.attachEvent){
    var r = obj.attachEvent("on"+evType, fn);
    return r;
  }
  else {
    return false;
  }
}

// Find all link elements and add an onfocus attribte and value
function hideFocusBorders(){
  var theahrefs = document.getElementsByTagName("a");
  if (!theahrefs){return;}
  for(var x=0;x!=theahrefs.length;x++){
    theahrefs[x].onfocus = function stopLinkFocus(){this.hideFocus=true;};
  }
}

//event added using the addEvent() function above
addEvent(window, 'load', hideFocusBorders);

function displaytable(num)
{
	for (i = 1; i < 4; i++)
	{
		if (i != num)
		{
		document.getElementById('table'+i).style.visibility = "hidden";
		document.getElementById('table'+i).style.position = "absolute";
		}
	}

	if (document.getElementById('table'+num).style.visibility == "visible")
	{
		document.getElementById('table'+num).style.visibility = "hidden";
		document.getElementById('table'+num).style.position = "absolute";
	}
	else
	{
		document.getElementById('table'+num).style.visibility = "visible";
		document.getElementById('table'+num).style.position = "relative";
		document.getElementById('table'+num).style.left = "6px";
	}
}