function swapImage(img_name,img_src,img_lay) {
if ( img_lay == null )
{
img_lay = "0"
}
if ( img_lay == "0")
	{
	document[img_name].src=img_src;
	}
else
	{
	if (document.layers)
		{
		eval('document.Layer' + img_lay + '.document.images["' + img_name + '"].src = "' + img_src + '"');
		}
		else
		{
		document[img_name].src=img_src;
		}
	}
}