function newImage(arg)
{
	if (document.images)
	{
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages()
{
	if (document.images && (preloadFlag == true))
	{
		for (var i=0; i<changeImages.arguments.length; i+=2)
		{
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages()
{
	if (document.images)
	{
		main_07_over = newImage("lay/pl_main_07-over.jpg");
		main_08_over = newImage("lay/pl_main_08-over.jpg");
		main_09_over = newImage("lay/pl_main_09-over.jpg");
		main_10_over = newImage("lay/pl_main_10-over.jpg");
		main_11_over = newImage("lay/pl_main_11-over.jpg");
		main_12_over = newImage("lay/pl_main_12-over.jpg");
		main_13_over = newImage("lay/pl_main_13-over.jpg");
		main_14_over = newImage("lay/pl_main_14-over.jpg");
		preloadFlag = true;
	}
}