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 switchImage(imgName, imgSrc)
{
	if (document.images)
	{
		if (imgSrc != "none")
		{
			document.images[imgName].src = imgSrc;
		}
	}
}

function change(header, target)
{
	var ie4		= document.all;
	var ns4		= document.layers;
	var gecho	= document.getElementById && !document.all; 
	var src_obj;
	var dest_obj;

	if(ns4)
	{
		src_obj = document.layers[header];
		dest_obj = document.layers[target];
	}
	else if(ie4)
	{
		src_obj = document.all(header);
		dest_obj = document.all(target);
	}
	else
	{
		src_obj = document.getElementById(header);
		dest_obj = document.getElementById(target);
	}

	if(dest_obj.style.display == "block")
	{
		dest_obj.style.display = "none";
	}
	else
	{
		dest_obj.style.display = "block";
	}
}