function despliega(quien_llama)
{
	ocultarSubMenus();
	formatobotones();
	switch(quien_llama)
	{
		case 1:
  			document.getElementById("ulair").style.display = "block";
			document.getElementById("liair").style.fontWeight='bold';
			break;
		case 2:
			document.getElementById("liinstants").style.fontWeight='bold';
			break;
		case 3:
			document.getElementById("ulnature").style.display = "block";
			document.getElementById("linature").style.fontWeight='bold';
			break;
		case 4:
			document.getElementById("ulsports").style.display = "block";
			document.getElementById("lisports").style.fontWeight='bold';
			break;
		case 5:
			 document.getElementById("ulsportsauto").style.display = "block";
			 document.getElementById("lisportsauto").style.fontWeight='bold';
			break;
		case 6:
			document.getElementById("ulvoyage").style.display = "block";
			document.getElementById("livoyage").style.fontWeight='bold';
			break;
	}
}


function ocultarSubMenus()
{
	document.getElementById("ulair").style.display = "none";
	document.getElementById('ulnature').style.display='none';
	document.getElementById('ulsports').style.display='none';
	document.getElementById('ulsportsauto').style.display='none';
	document.getElementById('ulvoyage').style.display='none';
}

function formatobotones()
{
	document.getElementById("liair").style.fontWeight='normal';
	document.getElementById("liinstants").style.fontWeight='normal';
	document.getElementById("linature").style.fontWeight='normal';
	document.getElementById("lisports").style.fontWeight='normal';
	document.getElementById("lisportsauto").style.fontWeight='normal';
	document.getElementById("livoyage").style.fontWeight='normal';
}