Change content, correct to immediately open the file

Good day, project users. How to make the content immediately open.

function showContent(link) { var cont = document.getElementById('contentBody'); var loading = document.getElementById('loading'); cont.innerHTML = loading.innerHTML; var http = createRequestObject(); if( http ) { http.open('get', link); http.onreadystatechange = function () { if(http.readyState == 4) { cont.innerHTML = http.responseText; } } http.send(null); } else { document.location = link; } } // создание ajax объекта function createRequestObject() { try { return new XMLHttpRequest() } catch(e) { try { return new ActiveXObject('Msxml2.XMLHTTP') } catch(e) { try { return new ActiveXObject('Microsoft.XMLHTTP') } catch(e) { return null; } } } }