function simplePreloadOn() { 
  var args = simplePreloadOn.arguments;
  document.imageArrayOn = new Array(args.length);
  for(var i=0; i<args.length; i++) {
	document.imageArrayOn[i] = new Image;
	document.imageArrayOn[i].src = "images/" + args[i];
  }
}

function simplePreloadOff() { 
  var args = simplePreloadOff.arguments;
  document.imageArrayOff = new Array(args.length);
  for(var i=0; i<args.length; i++) {
	document.imageArrayOff[i] = new Image;
	document.imageArrayOff[i].src = "images/" + args[i];
  }
}

function switchImage(imgName, onOrOff, num) {
  if (document.images) {
	  if (onOrOff == "on") document.images[imgName].src = document.imageArrayOn[num].src;
	  else document.images[imgName].src = document.imageArrayOff[num].src;
  }
}


function popwin() {		
	var popW = 404, popH = 400;
	var w = screen.availWidth;
	var h = screen.availHeight;
	var popName = "myWin";
	
	page = popwin.arguments[0];
	
	if(popwin.arguments[1]) popW = popwin.arguments[1];
	if(popwin.arguments[2]) popH = popwin.arguments[2];
	if(popwin.arguments[3]) popName = popwin.arguments[3];
	
	var leftPos = (w-popW)/2, topPos = (h-popH)/2;
	
	myWin = window.open(page,popName,"resizable=1,scrollbars=1,width="+popW+",height="+popH+",top="+topPos+",left="+leftPos)
	myWin.focus();
}