function MouseOverLat(oImg, oImgF)
	{
	document.all['imagen_caja'].src = oImg
	document.all[oImgF].src = 'images/flecha.gif'
	}
	
function MouseOutLat(oImg, oImgF)
	{
	document.all['imagen_caja'].src = oImg;
	document.all[oImgF].src = 'images/transp2.gif'
	}