Following code resolved my issue
function shwAtt(strPath) {
var varExt = strPath.split('.');
if (varExt[varExt.length - 1] == "txt") {
window.open(strPath);
}
else {
var iframe;
iframe = document.getElementById("hiddenDownloader");
if (iframe == null) {
iframe = document.createElement('iframe');
iframe.id = "hiddenDownloader";
iframe.style.visibility = 'hidden';
document.body.appendChild(iframe);
}
iframe.src = strPath;
}
return false;
}
Happy coding :)