function cambia_imagen(i)
{
	switch(i)
	{
		case 1 : document.images[0].src = "imagenes/proy_b.gif";
			break;
		case 2 : document.images[2].src = "imagenes/perit_b.gif";
			break;
		case 3 : document.images[3].src = "imagenes/valor_b.gif";
			break;
		case 4 : document.images[4].src = "imagenes/docu_b.gif";
			break;
		case 5 : document.images[5].src = "imagenes/dise_b.gif";
			break;
		case 6 : document.images[6].src = "imagenes/cont_b.gif";
			break;
	}
}

function vuelve(i)
{
	switch(i)
	{
		case 1 : document.images[0].src = "imagenes/proy_a.gif";
			break;
		case 2 : document.images[2].src = "imagenes/perit_a.gif";
			break;
		case 3 : document.images[3].src = "imagenes/valor_a.gif";
			break;
		case 4 : document.images[4].src = "imagenes/docu_a.gif";
			break;
		case 5 : document.images[5].src = "imagenes/dise_a.gif";
			break;
		case 6 : document.images[6].src = "imagenes/cont_a.gif";
			break;
	}
}

function apretado()
{
	if (document.location.src.indexOf('valorac') != -1)
	{
		cambia_imagen(3);
	}
	if (document.location.src.indexOf('Contacte') != -1)
	{
		cambia_imagen(6);
	}
	if (document.location.src.indexOf('document') != -1)
	{
		cambia_imagen(4);
	}
	if (document.location.src.indexOf('internet') != -1)
	{
		cambia_imagen(5);
	}
	if (document.location.src.indexOf('perit') != -1)
	{
		cambia_imagen(2);
	}
	if (document.location.src.indexOf('proyec') != -1)
	{
		cambia_imagen(1);
	}
}