Download file using javascript/Jquery

On aspx page add this:

<iframe id="hiddenDownloaderForPdf" style="display:none" ></iframe>


on Javascript file:

function downloadFile (url) {
        var hiddenDownloaderForPdf= 'hiddenDownloaderForPdf'
        iframe = document.getElementById(hiddenDownloaderForPdf);
//if iframe isnt available create one dynamiclly
    if (iframe === null) {
        iframe = document.createElement('iframe');
        iframe.id = hiddenDownloaderForPdf;
        iframe.style.display = 'none';
        document.body.appendChild(iframe);
    }
    iframe.src = url;
}

using jQuery:
function downloadFile (url) {
        var hiddenIFrameID = 'hiddenDownloaderForPdf'

       $('#'+ iframe).attr('src' ,url);
  }

Happy Living.....
Happy Concepts.......
Happy Coding........