function cambio_menu(id)
{
	//document.getElementById(id).bgColor = "#f1f4f7";
}

function hidesubmenu()
{
	for(i=0;i<menu.length;i++)
	{
        var id = "p_" + menu[i]
        var img = "img_" +id;
        document.getElementById(id).style.display = "none";
		document.getElementById(img).src = "img/flecha_1.gif";
    }
}
function showhide(id)
{
	var img = "img_" +id;

	if (document.getElementById(id).style.display == "none")
    {
		hidesubmenu();
        document.getElementById(id).style.display = "block";
        document.getElementById(img).src = "img/flecha_2.gif";
	}
	else
    {
    	document.getElementById(id).style.display = "none";
    	document.getElementById(img).src = "img/flecha_1.gif";
    }
}