try below steps, it could be some settings that you need to set in Internet Options. And also show different style of opening a page in a new window.
http://stackoverflow.com/questions/4907843/open-a-url-in-a-new-tab-using-javascript
try below steps, it could be some settings that you need to set in Internet Options. And also show different style of opening a page in a new window.
http://stackoverflow.com/questions/4907843/open-a-url-in-a-new-tab-using-javascript