// JavaScript Document
function avanzado()
{

	if(document.getElementById('avanzado').style.visibility == 'visible')
	{
		document.getElementById('avanzado').style.visibility = 'hidden';
		document.getElementById('checkboxes').style.visibility = 'hidden';
	}
	else
	{
		document.getElementById('avanzado').style.visibility = 'visible';
		document.getElementById('checkboxes').style.visibility = 'visible';
	}
	
}