function setActiveItem(i)
{
	document.getElementById("demo_nav_home").className = "normal";
	document.getElementById("demo_nav_institucional").className = "normal";
	document.getElementById("demo_nav_libro").className = "normal";
	document.getElementById("demo_nav_medik").className = "normal";
	document.getElementById("demo_nav_interdrugs").className = "normal";
	document.getElementById("demo_nav_novedades").className = "normal";
	document.getElementById("demo_nav_actualizaciones").className = "normal";
	document.getElementById("demo_nav_cursos").className = "normal";
	document.getElementById("demo_nav_compra").className = "normal";
	document.getElementById(i).className = "active";
}