function dowloadExcel(){
let fecha = fechaActual()
var tmpElmnt = document.createElement('a');
var data_type = 'data:aplication/vnd.ms-excel';
var tabla = document.getElementById('tabla');
var tabla_html = tabla.outerHTML.replace(/ /g, '%20');
tmpElmnt.href = data_type + ', ' + tabla_html;
tmpElmnt.download = `table${fecha}.xls`;
tmpElmnt.click();
}