How to download favicon icon using javascript .

(function() { var i=0; var arrLink = []; var found = 0; arrLink = document.getElementsByTagName('link'); if (arrLink.length > 0) { for (i=0; i < arrLink.length; i++) { if (typeof arrLink[i].rel !== 'undefined' && arrLink[i].rel.indexOf('icon') > -1) { found = 1; window.open(arrLink[i].href); } } if (found === 0) { alert('favico Not Found'); } } else { alert('favico Not Found'); } })();