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];
  }
}


function show(which){
	m=document.getElementById("menu");
	trig=m.getElementsByTagName("div").item(which).style.display;
	if (trig=="block") trig="none";
	else if (trig=="" || trig=="none") trig="block";
	m.getElementsByTagName("div").item(which).style.display=trig;
}

function switch_vis( obj) {
	obj = obj.parentNode.parentNode;
	thisChilds = obj.getElementsByTagName("div");
	for (var i = 0; i < thisChilds.length; i++){
		parentEl = thisChilds[i].parentNode;
		if ( parentEl == obj) {
			trig = thisChilds[i].style.display;
			if ( 'none' == trig) {
				thisChilds[i].style.display = 'block';
			}
			else {
				thisChilds[i].style.display = 'none';
			}
		}
	}
}