// image preloader
function simplePreload()
{ 
  var args = simplePreload.arguments;
  document.imageArray = new Array(args.length);
  for(var i=0; i<args.length; i++)
  {
    document.imageArray[i] = new Image;
    document.imageArray[i].src = args[i];
  }
}

// content switching - leave all content in the HTML for crawlers to discover
function show(objId) {
  hide();
  document.getElementById(objId).style.display = '';
}

function hide() {
  var td = document.getElementsByTagName("td")
  for (i=0; i<td.length; i++) {
	if (td[i].className=="content") td[i].style.display="none";
  }
}