function descargar(ruta) {
window.URL = window.URL || window.webkitURL; // Take care of vendor prefixes.
var urlruta = encodeURI(ruta);
var base_url_js = $('#base_url_js').val();
var xhr = new XMLHttpRequest();
xhr.open('GET', base_url_js + urlruta, true);
xhr.responseType = 'blob';
xhr.onload = function(e) {
if (this.status == 200) {
var blob = new Blob([this.response], {type: 'application/pdf'});
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "evaluacion.pdf";
link.click();
}
};
xhr.send();
}