function load_blog()
{ 
	window.open('http://www.agendasalpassa.blogspot.com','BlogSalpassa',''); 
}
function ShowSubMenu( submenu )
{
	//Display: none --> Display: block
	if ( submenu == "submenu_material" )
	{
		document.getElementById("submenu_actividades").style.display = 'none';
	}
	else
	{
		document.getElementById("submenu_material").style.display = 'none';
	}
	
	var obj = document.getElementById( submenu );
	if(obj.style.display == 'block') obj.style.display = 'none'
	else obj.style.display = 'block'
	
}