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)
	{
		ym_01_ImageMap_01_over = newImage("/images/ym_01-ImageMap_01_over.gif");
		ym_01_ImageMap_02_over = newImage("/images/ym_01-ImageMap_02_over.gif");
		ym_01_ImageMap_03_over = newImage("/images/ym_01-ImageMap_03_over.gif");
		ym_01_ImageMap_05_over = newImage("/images/ym_01-ImageMap_05_over.gif");
		ym_01_ImageMap_06_over = newImage("/images/ym_01-ImageMap_06_over.gif");
		preloadFlag = true;
	}
}