In my link, I have target="_blank" attribute, and it works in Chrome, Firefox, Opera, and of course, Safari and opens the link a new TAB. But When I click on it, in IE9 (and IE8) it opens a new window instead of being opened in a new tab. What should I do?
HTML and JavaScript provide no means to say if a new "window" should be a full window, or a tab, or whatever you want to call the Mobile Safari multiple views interface.
So you live with it.
You can see in this question that the target="_blank" is correct, but the way the browser handles this case is up to his settings.
You need to change IE8/9 settings to open that kind of target in a new tab. There's nothing you can do :|
This is configured browser side and theres nothing you can do about it in your html I'm afraid. Its just an option that a user sets in their browsers preferences.
Unchecking Protected Mode in IE9 resolved my problem.
Windows Internet Explorer 8 and later. When Protected Mode is enabled and a webpage contains an anchor link with a named target, Windows Internet Explorer opens the target of the link in a new window when the target has a different integrity level than the webpage containing the link.
Source: target attribute in IE
You need to use the target="_blank" attribute to make links open in a new window or tab. Where the link actually opens is up to the browser settings. So if you have Tools > Internet Options > Tabbed Browsing Settings > "Always open pop-ups in new tabs" selected, a target="_blank" link will open in a new tab. Note that this type of link will open in a new window by default on most browsers.
来源：https://stackoverflow.com/questions/6661696/target-blank-opens-a-new-window-in-ie9-instead-of-a-new-tab