if you use window.open(url, '_blank')
, it will be blocked(popup blocker) on Chrome,Firefox etc
try this,
$('#myButton').click(function () {
var redirectWindow = window.open('http://google.com', '_blank');
redirectWindow.location;
});
working js fiddle for this http://jsfiddle.net/safeeronline/70kdacL4/2/
working js fiddle for ajax window open http://jsfiddle.net/safeeronline/70kdacL4/1/